CN218958255U - Device for generating and amplifying gallery mode laser by exciting serial microcavity through continuous wave light source - Google Patents
Device for generating and amplifying gallery mode laser by exciting serial microcavity through continuous wave light source Download PDFInfo
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Abstract
The utility model discloses a device for generating and amplifying a corridor mode laser by exciting and connecting microcavities with different diameters in series by a continuous light source, which comprises a continuous light source, a first transmission optical fiber and a plurality of SiO plated with rare earth ions with different diameters for generating and amplifying the corridor mode laser 2 Film microcavities, the same number of microcavities being used to couple a continuous wave light source into the microcavity as a laserThe excitation light source, the coupler for coupling out the generated gallery mode laser and the second transmission optical fiber. The utility model uses continuous wave light source to provide wide range wavelength, has arbitrary direction polarization, and can always have light coupling microcavity adapting to microcavity morphology characteristic spectrum as excitation source; and the characteristics that the rare earth ions are rich in energy level and can absorb photons of a wide-range wave band excitation light source as an excitation source are utilized, the two are combined to form a structure that microcavities with different diameters are connected in series through an optical fiber coupler, and the vestibule mode laser which is the same as the resonance spectrum of each stage of microcavity is generated, and the back stage microcavity amplifies the vestibule mode laser of the front stage and the same wavelength.
Description
Technical Field
The utility model belongs to the field of micro lasers, and particularly relates to a device for generating and amplifying gallery mode laser by exciting a serial microcavity by a continuous wave light source.
Background
With the development of integrated optoelectronic technology, lasers evolve toward miniaturization and integration. The low-loss dielectric microcavity comprises a microsphere cavity, a microcolumn cavity, a micro-ring cavity and a micro-disk cavity, and forms a smooth surface under the action of the surface tension of liquid due to high-temperature melting. When light is coupled to a microcavity at grazing incidence by a near-field evanescent coupler, when the wavelength of the light satisfies resonance with the microcavity (the integral multiple of the wavelength of the light in the medium is equal to the perimeter of the cavity), the light is confined by the medium surface and continuously totally reflected at the inner surface to form an optical field distribution surrounding the great circle of the microcavity, and the optical field distribution is called as a gallery mode (WGM) resonance, and the wavelength arrangement satisfying the gallery mode resonance is called as a morphology resonance spectrum. Since the WGM is distributed only in a small region of the microcavity macrocycle and has a small mode volume, there is a certain optical power coupling into the microcavity surface, resulting in a very high power density of the WGM. Extremely high power density is the basis for nonlinear optical phenomena and is also a prerequisite for low threshold lasers. Such microcavities with smooth low-loss surfaces can maintain high quality factors (high Q values), often as microresonators where rare earth doped photoinduced stimulated radiation or dielectric nonlinearities are scattered lasers, commonly referred to as mode-of-thumb (WGM) lasers.
Such low threshold and narrow linewidth gallery mode microcavity lasers have been demonstrated in silica, phosphate and tellurate glasses, which microcavity is doped with different rare earth doped ions, such as neodymium (Nd), erbium (Er), thulium (Tm), holmium (Ho), etc., and a visible to near and mid infrared microcavity laser is formed by pumping with different laser sources, such as the patent CN 201810239383-a cascade pumped microcavity laser; CN112290363a is a manufacturing method of low-cost whispering gallery microcavity laser based on erbium-doped microspheres.
Research has demonstrated that the output power of such microcavity lasers is relatively low. In general, microcavity lasers are excited by forming a WGM resonance with pump light at a wavelength close to the absorption wavelength of the laser active material, which provides maximum excitation efficiency, but requires that the optical frequency of the external laser source must match the optical resonance frequency of the pump WGM. Therefore, in the gallery mode microcavity laser, a single-frequency laser source with a narrow linewidth and tunable frequency is generally adopted as an excitation light source, but the wavelength of the pumping light output by the pumping source needs to be adjusted in real time along with the change of temperature due to vibration or the inherent resonance wavelength of the microcavity so as to match the pumping wavelength with the inherent wavelength of the microcavity, and the pumping wavelength enters the microsphere with the maximum coupling efficiency, which leads to inadaptability in practical application of the gallery mode microcavity laser. To solve the above problems, we propose to use a continuous wave light source as an excitation light source, such as an Amplified Spontaneous Emission (ASE) or Light Emitting Diode (LED) light source as a pump laser. Wherein, the ASE light source is a high-stability, high-power and broadband light source. It can reduce coherent noise of system, phase noise caused by fiber Rayleigh dispersion and phase shift caused by optical Kerr effect. The ASE source of the rare earth doped optical fiber has the advantages of stable output spectrum, small environmental impact, easy coupling with a single-mode fiber sensing system and the like. The combined structure of serially connected rare earth doped microcavities with different diameters and the optical fiber coupler can fully utilize the broad spectrum and multiple polarization states of the power ASE light source, can simultaneously provide microcavities with different diameters as excitation sources, and can fully utilize rare earth ion energy level rich and absorbable multi-wavelength photons as pumping sources of outer electrons to generate and amplify corridor mode lasers with high efficiency. The defect that single-frequency laser is adopted as pump light at present is overcome, and the single-frequency laser pump source is easily influenced by environmental temperature and vibration, so that excitation light is detuned. The continuous light excitation source always has the wavelength resonating with the microsphere cavity in a wide spectrum range, is not influenced by ambient temperature and vibration, and can provide excitation sources for a plurality of microspheres with different diameters which are connected in series.
Disclosure of Invention
The utility model aims to provide a serial rare earth ion doped SiO excited by a continuous wave light source based on the theoretical basis and the method 2 A device for generating and amplifying a gallery mode laser by a microcavity,
the utility model solves the technical problems by adopting the scheme that: a device for generating and amplifying a gallery mode laser by exciting a serial microcavity with a continuous wave light source comprises a continuous light source for providing pump light, a first transmission optical fiber for transmitting the exciting light, and a plurality of rare earth ion doped SiO with different diameters for generating and amplifying the laser 2 The film microcavity, the coupler which is the same as the microcavity in number and is used for coupling the continuous light source into the microcavity to form a gallery mode and coupling out the generated laser, and the second optical fiber which is used for transmitting the laser; one end of the first transmission optical fiber is connected with a continuous wavelength light source serving as a pumping source, the other end of the first transmission optical fiber is connected with the head end of the coupler, the couplers are respectively tangentially coupled with the large circular cross sections of the microcavities in one-to-one correspondence, the couplers are connected end to end, one end of the second transmission optical fiber is connected with the tail end of the last coupler, and the other end of the second transmission optical fiber is connected with a laser output port of a amplified gallery mode.
Further, the film plating microcavity is prepared by plating a functional film on the microcavity by a sol-gel method, the thickness of the functional film is between 0.5 and 2 mu m, and the diameter of the microcavity is between 10 and 5000 mu m, and the microcavity can be a microsphere, a microcolumn, a microdisk, a microchip ring microcavity and a microring; the diameters of the serially connected microcavities are different; the microcavity is made of SiO 2 Microdisk or SiO 2 The optical fiber is manufactured by heating and melting at high temperature to form a smooth microcavity under the action of the surface tension of liquid. The high temperature heating source can be alcohol burner flame, methane gas flame, hydrogen flame or CO 2 A laser, etc.; the front series microcavity generates laser, and the rear series microcavity can generate laser with new wavelength and amplify laser with the wavelength resonant with the front microcavity. The generated laser is related to the wavelength of the doped rare earth ions and the pump source, such as 1550nm band of communication wavelength, for the 2 μm band of laser procedure and eye safety.
Further, the continuous wave light source is a Light Emitting Diode (LED), or an Amplified Spontaneous Emission (ASE), or other light sources outputting continuous wavelengths, which may be 900-1100 nm, or 1500-160 nm.
Further, the optical fiber coupler is a biconical optical fiber or a half-cut optical fiber with a half polished section. The first transmission optical fiber and the second transmission optical fiber are standard communication quartz optical fiber, plastic optical fiber or nylon optical fiber. The continuous light source, the first transmission optical fiber, the coupler, the second transmission optical fiber and the laser output port of the amplified gallery mode are all connected through an optical fiber connector, and the optical fiber connector refers to a passive device for connecting the optical fibers.
Further, the rare earth doped ions may be erbium (Er 3+ ) Thulium (Tm) 3+ ) Neodymium (Nb) 3+ ) Ytterbium (Yb) 3+ ) Holmium (Ho) 3 + ) Praseodymium (Pr) 3+ ) Or a combination thereof. Micro-cavity externally plated rare earth ion doped SiO 2 The functional film adopts a sol-gel method, and the thickness of the functional film is between 0.5 and 2 mu m;
the method for doping rare earth ions in the sol by the sol-gel method is a general method, and the rare earth ions are added through nitrate or chloride.
Further, the method for preparing the rare earth ion doped sol comprises the following steps:
step S1: the solvent with the purity of 99.9 percent is measured according to the volume fraction ratio of 39.9 percent of tetraethoxysilane, 39.9 percent of absolute ethyl alcohol, 19.2 percent of deionized water and 1 percent of dimethylformamide, and the total volume of V (5-50 ml) is placed in a beaker;
step S2: adding a calculated amount of nitrate or chloride hydrate (enabling rare earth ions of the film to be 2-6 wt%) into a beaker, placing the beaker into a magnetic vibrator, sealing the beaker, and placing the beaker onto a magnetic stirrer;
step S3: starting a magnetic stirrer, and stirring for 3-5 hours at normal temperature;
step S4: and turning off the magnetic stirrer, standing the beaker for 5-15 hours to form sol, and storing the sol in an environment of 25 ℃.
Further, the sol-gel method is adopted to coat the micro-cavity, and the method comprises the following steps:
step P1: immersing the microcavity into gel for 1-3 min, taking out and airing for 3-8 min, heating the microcavity attached with the aired gel by using discharge arc or laser to melt the fused gel, naturally cooling to form a compact functional film, observing under a film-plating microcavity microscope, and measuring and recording the diameter;
step P2: step P1 is repeated until the functional film thickness is between 0.5 μm and 2. Mu.m.
Further, the excitation light source is a wavelength capable of absorbing rare earth ions in the film coating layer of the microcavity, and is a light source such as LED, ASE, SLED light source for emitting continuous wavelengths, and the excitation light source is used for exciting rare earth ions in the outer layer of the microcavity to generate a gallery mode laser.
Further, the generated and amplified gallery mode laser wavelength and intensity are detected by a spectrum analyzer, an optical power meter, or an optical wavelength meter.
The utility model also provides a method for generating and amplifying the laser of the gallery mode by the device, which is to plate SiO doped with rare earth ions 2 The membrane microcavity is in tangential contact with the coupler to form a structure that microcavities with different diameters are connected in series through the optical fiber coupler. Turning on a continuous wave light source, transmitting light emitted by the continuous wave light source as excitation light to a first-stage coupler of the serial microcavity through a first transmission optical fiber, and coupling the excitation light into SiO doped with rare earth ions at a first stage by evanescent wave 2 In the film microcavity, stimulated radiation generates a gallery mode laser of the first microcavity; the rest exciting light and the gallery mode laser of the first stage microcavity are selectively introduced into the second stage rare earth ion doped SiO through the second stage coupler 2 And generating a gallery mode laser of the second microcavity and amplifying a gallery mode laser of the first microcavity, which has the same wavelength as the gallery mode laser of the second microcavity, in the film microcavity. And the serial microcavities of more than three stages are identical to the serial microcavities, the continuous light source is excited to generate the cavity of the stage to generate the cavity mode laser, the cavity mode laser of the wavelength cavity of the front stage identical to the cavity of the stage is amplified, and finally the cavity mode laser of each wavelength cavity is output through the second transmission optical fiber. The utility model can generate the gallery mode laser in each stage of microcavity, and simultaneously the lower stage microcavity amplifies the energy generated by the upper stage microcavity to be shared with the gallery mode laser of the stageThe resonant laser has almost no loss of non-resonant wavelength, and makes full use of the energy of ASE light source and the characteristic of rare earth ion absorption with wider band photon to produce and amplify the gallery mode laser in high efficiency.
Compared with the prior art, the utility model has the following beneficial effects:
(1) The gallery mode laser is easy to generate and amplify. The utility model uses the film plating microcavity to obtain the quality factor and the power density of the far-ultra-Fabry-Perot microcavity or the photonic crystal microcavity, thereby being beneficial to realizing the stimulated radiation process and obtaining the gallery mode laser.
(2) The exciting light source is a low-cost LED or ASE light source, and can be efficiently utilized. The utility model fully utilizes the energy of the continuous light source by connecting the rare earth ion doped microcavities in series and amplifies the gallery mode laser with high efficiency.
(3) The combined structure of serially connected rare earth doped microcavities with different diameters and the optical fiber coupler can fully utilize the broad spectrum and multiple polarization states of the power ASE light source, can simultaneously provide microcavities with different diameters as excitation sources, and can fully utilize rare earth ion energy level rich and absorbable multi-wavelength photons as pumping sources of outer electrons to generate and amplify corridor mode lasers with high efficiency. The defect that single-frequency laser is adopted as pump light at present is overcome, and the single-frequency laser pump source is easily influenced by environmental temperature and vibration, so that excitation light is detuned. The continuous light excitation source always has the wavelength resonating with the microsphere cavity in a wide spectrum range, is not influenced by ambient temperature and vibration, and can provide excitation sources for a plurality of microspheres with different diameters which are connected in series.
(4) The cost is low. The utility model adopts the common and technically reliable products of continuous wave light source, first transmission optical fiber, second transmission optical fiber and the like, and can greatly reduce the cost of the gallery mode laser.
Drawings
The utility model is further described with reference to the drawings;
FIG. 1 is a schematic diagram of a continuous light source excitation tandem microcavity generation and amplification gallery mode laser apparatus of the present utility model;
FIG. 2 is a schematic diagram of a continuous light source excitation tandem microcavity generation and amplification gallery mode laser apparatus of example 1;
FIG. 3 is an energy absorption spectrum of an ASE light source according to embodiment 1 of the present utility model;
FIG. 4 is a graph showing the laser output of a 2 μm gallery mode in accordance with example 1 of the utility model;
in the figure: TDSM indicates Tm doping 3+ Silica microspheres;
in fig. 3: TDSM1, TDSM2 and TDSM1 + TDSM2 are coupled respectively;
in fig. 4: a laser spectrum around 2 μm generated by ASE pumping TDSM, (a) laser spectrum when TDSM1, TDSM2 act alone. (b) laser spectra when TDSM1 and TDSM2 are cascaded.
Detailed Description
The utility model is further described below with reference to the drawings and the detailed description.
Example 1
As shown in FIG. 2, the 1550 nm-band ASE continuous light source of the embodiment excites and concatenates thulium-doped SiO 2 The microsphere generating and amplifying device for 2 μm corridor mode laser includes one 1550nm band ASE continuous light source for providing exciting light, one first transmission fiber for transmitting exciting light, two thulium ion doped SiO plates for generating and amplifying 2 μm laser 2 The film microsphere, the coupler which is the same in number as the microsphere and is used for coupling 1550 nm-band continuous light sources into the microsphere to form a gallery mode and coupling out generated 2 mu m laser, and the second optical fiber which is used for transmitting the 2 mu m laser; one end of the first transmission optical fiber is connected with a 1550 nm-band continuous light source, the other end of the first transmission optical fiber is connected with the head end of a first coupler, and each coupler is respectively connected with thulium-doped SiO 2 The microsphere equators are tangentially coupled in one-to-one correspondence, the couplers are connected end to end, one end of the second transmission optical fiber is connected with the tail end of the second coupler, and the other end of the second transmission optical fiber is a 2 mu m laser output port.
In this embodiment, the coated microsphere cavity is made by coating a functional film on the microsphere cavity by a sol-gel method, the thickness of the functional film is between 0.5 μm and 2 μm, and the microsphere cavity is made by melting a single-cone optical fiber, and the diameter is between 160 μm and 165 μm.
In this embodiment, the single-cone optical fiber is made by heating a small section of standard single-mode optical fiber with a hydrogen flame and stretching.
In this embodiment, the 1550nm CW light source is an amplified spontaneous emission amplified light source (ASE light source) for exciting thulium ions in the microsphere to generate 2 μm stimulated emission laser, and the coupler is a biconic optical fiber.
In this embodiment, the sol-gel method is a thulium ion (Tm 3+ ) The doping method is that thulium ions are added through thulium nitrate. Although various gallery mode microcavity lasers have been studied and developed rapidly, most pump light sources so far have been single wavelength lasers employing tunable lasers, which have problems. Firstly, when pump laser is coupled into the microsphere, heat is generated, the refractive index is changed due to a thermo-optical effect, the inherent resonance wavelength is changed, and the wavelength needs to be tuned; secondly, when the input optical fiber is detuned due to the change of the polarization state of the input optical fiber caused by the change of the stress of the input optical fiber caused by the environmental vibration, the wavelength needs to be tuned, namely the laser works in a stable environment and cannot be subjected to vibration; third, tunable lasers are expensive. According to the broadband of the ASE light source and the characteristic of omnidirectional polarization, the utility model provides excitation light which is suitable for the environment and the change of the natural resonant frequency of the microcavity, and the energy of the excitation light is fully utilized by using the cascade microsphere to generate and amplify 2 mu m laser.
In the present embodiment, tm is used 3+ The processing method of the doped sol comprises the following steps:
step S1: the solvent with the purity of 99.9 percent is measured according to the volume fraction ratio of 39.9 percent of tetraethoxysilane, 39.9 percent of absolute ethyl alcohol, 19.2 percent of deionized water and 1 percent of dimethylformamide, and the total volume of 5 milliliters is placed in a beaker;
step S2: a calculated amount of thulium nitrate hexahydrate (Tm of the film is allowed to stand in a beaker 3+ 4 wt%) and placing a magnetic vibrator, sealing the beaker and placing on a magnetic stirrer;
step S3: starting a magnetic stirrer, and stirring for 4 hours at normal temperature;
step S4: the magnetic stirrer was turned off, and the beaker was allowed to stand for 12 hours to form a sol, which was stored at 25 ℃.
In this embodiment, a gel method is used to coat the microsphere cavity, and the processing method includes the following steps:
step P1: firing the microspheres by electrode discharge arc: placing the single-cone optical fiber tip in a discharge electrode tip connecting line, setting specific discharge intensity and discharge time, naturally cooling to form a microsphere cavity after the single-cone optical fiber tip is molten by discharge, and placing the microsphere cavity under a microscope for observation and measuring and recording the diameter;
step P2: repeating the step P1 until the diameter of the microsphere cavity is 160-165 μm;
step P3: immersing the microsphere cavity into gel for 3min, taking out and airing for 5min, placing the microsphere cavity attached with the aired gel at the connecting line of the tip of a discharge electrode, setting specific discharge intensity and discharge time, heating the gel, naturally cooling the gel into a compact functional film, observing under a film-coated microsphere cavity microscope, and measuring and recording the diameter;
step P4: repeating the step P3 until the thickness of the functional film is between 0.5 μm and 2 μm
Thulium ions have a rich energy level structure with a broad absorption spectrum to excite electrons to the upper energy level. Coupling ASE broadband light into Tm 3+ When the coated microsphere cavity is doped, strong stimulated radiation light can be generated. The first transmission optical fiber and the second transmission optical fiber are common communication single-mode quartz optical fibers with the diameter of 125 mu m, and the raw materials of the biconical optical fibers are common communication single-mode quartz optical fibers with the diameter of 125 mu m.
The 2 mu m laser intensity obtained by adopting the two serially connected microsphere cavity coupling systems is respectively enhanced by 12.9 times and 2.7 times compared with the 2 mu m laser intensity obtained by independently coupling the two microsphere cavities, and is also enhanced by 2.2 times compared with the sum of the 2 mu m laser intensity obtained by independently coupling the two microsphere cavities.
In this embodiment, the first transmission optical fiber and the second transmission optical fiber are standard communication quartz optical fiber, plastic optical fiber or nylon optical fiber.
In this example, the generated 2 μm laser wavelength and intensity were detected by a spectrum analyzer (YOKOGAWA-AQ 6375B, wavelength range 1200-2400 nm).
The device of this example was used to generate and amplify 2 μm corridor laser by plating two thulium ion doped SiO 2 The membrane microsphere is coupled with two couplers to form a cascade microsphere, a 1550 nm-band ASE continuous light source is started, light emitted by the 1550 nm-band ASE continuous light source is used as excitation light to be transmitted to a first-stage coupler of the cascade microsphere through a first transmission optical fiber, and the excitation light is coupled into a first-stage thulium-ion-doped SiO plating through evanescent waves 2 In the film microsphere, stimulated radiation generates a gallery mode 2 mu m laser, and the transmitted stimulated light and the 2 mu m gallery mode laser plate the thulium ion doped SiO from the first stage 2 After the membrane microsphere is coupled into the first-stage coupler, the membrane microsphere is coupled into the second-stage thulium ion doped SiO plated through the second-stage coupler 2 And generating and amplifying 2-mu m-corridor mode laser in the film microsphere, and finally outputting the laser through a 2-mu m-corridor mode laser output port of the second transmission optical fiber. The back-stage microsphere cavity can generate 2 mu m gallery mode laser, and also amplify the 2 mu m gallery mode laser generated by the front-stage microsphere cavity and capable of resonating with the back-stage microsphere cavity, so that non-resonant wavelength passes almost without damage, and the energy of an ASE light source is fully utilized and the 2 mu m laser is amplified with high efficiency.
The utility model provides a specific construction structure for generating and amplifying 2 mu m wave band (1.85-2.15 mu m) laser by serially connecting microspheres with different diameters, which comprises the following steps:
the excitation light source is an ASE (or LED) light source, the output excitation light is used as pumping light, the pumping light passes through a quartz optical fiber (namely a first transmission optical fiber) with the diameter of 125 mu m and then enters a first-stage biconic optical fiber of a biconic optical fiber group, the excitation light is coupled into a first-stage coated microsphere cavity through evanescent waves, and the excitation radiation generates 2 mu m-band laser. The transmitted excitation light and 2 mu m-band laser are coupled into a first-stage biconical optical fiber from a first-stage coated microsphere cavity, then are coupled into a second-stage coated microsphere cavity through a second-stage biconical optical fiber to generate and amplify 2 mu m-band laser, are coupled into a last-stage coated microsphere cavity through a last-stage biconical optical fiber to generate and amplify 2 mu m-band laser, and finally are output through a second transmission optical fiber and a 2 mu m-band laser output port. The generated 2 μm band laser light is output from the last stage biconic fiber through another quartz fiber (i.e., a second transmission fiber) having a diameter of 125 μm. In the embodiment, the output end is connected with a spectrum analyzer, and the cascade microsphere cavity is actually measured to more efficiently utilize the ASE light source energy and output 2 mu m-band laser with higher intensity.
In conclusion, the method for generating and amplifying 2 mu m-band laser based on the serial coupling of thulium-doped microsphere coupled biconical optical fiber structures with different diameters is simple in structure, low in cost and high in reliability. The microsphere cavities with different diameters are required to be connected in series, because the free spectral range (delta lambda) of the morphology resonance characteristic spectrum of the microspheres with different diameters FSR =λ 2 On the one hand, continuous pumping light sources such as ASE and the like can be effectively utilized, on the other hand, different lasers with the wave length of 2 mu m can be generated, and the rear-stage microspheres can amplify lasers with the same wave length generated by the front-stage microspheres, so that the function of generating and amplifying the lasers with the wave length of 2 mu m is realized. If the diameter of each microsphere is the same, delta lambda is obtained FSR In the same way, the wavelength of the ASE light source coupled into the front-stage microsphere and resonating with the ASE light source is the same as that of the front-stage microsphere, so that the rear-stage microsphere can hardly obtain pumping energy, and the effects of generating multi-wavelength 2 mu m-band laser and amplifying the front-stage laser are not realized. The different diameter microspheres are combined with a continuous wave excitation light source, as opposed to a single wavelength laser as the excitation light source.
While the foregoing is directed to the preferred embodiment, other and further embodiments of the utility model will be apparent to those skilled in the art from the following description, wherein the utility model is described, by way of illustration and example only, and it is intended that the utility model not be limited to the specific embodiments illustrated and described, but that the utility model is to be limited to the specific embodiments illustrated and described.
Claims (6)
1. A device for generating and amplifying a gallery mode laser by exciting a serial microcavity by a continuous wave light source is characterized in that: comprising a continuous light source for providing pumping light, a first transmission fiber for transmitting excitation light, a plurality of rare earth ion doped SiO with different diameters for generating and amplifying laser light 2 Film microcavities, the same number as microcavities for coupling continuous light sources into a microcavityThe cavity forms a gallery mode, a coupler for coupling out laser, and a second transmission optical fiber for transmitting the laser; one end of the first transmission optical fiber is connected with a continuous wavelength light source serving as a pumping source, the other end of the first transmission optical fiber is connected with the head end of the coupler, the couplers are respectively tangentially coupled with the large circular cross sections of the microcavities in one-to-one correspondence, the couplers are connected end to end, one end of the second transmission optical fiber is connected with the tail end of the last coupler, and the other end of the second transmission optical fiber is connected with a laser output port of an amplified gallery mode.
2. The apparatus for generating and amplifying a gallery mode laser by exciting a tandem microcavity with a continuous wave light source according to claim 1, wherein: the continuous wave light source is a light emitting diode, or an amplified spontaneous emission light source, or other light sources outputting continuous wavelengths, and the wavelengths of the light sources are 900-1100 nm or 1500-160 nm.
3. The apparatus for generating and amplifying a gallery mode laser by exciting a tandem microcavity with a continuous wave light source according to claim 1, wherein: the SiO is 2 The diameter of the membrane microcavity is between 10 μm and 5000 μm, and each membrane microcavity is connected with SiO in series 2 The membrane microcavities are not of the same diameter.
4. The apparatus for generating and amplifying a gallery mode laser by exciting a tandem microcavity with a continuous wave light source according to claim 1, wherein: the coupler is a biconical optical fiber or a half-section optical fiber with half polished in the middle.
5. The apparatus for generating and amplifying a gallery mode laser by exciting a tandem microcavity with a continuous wave light source according to claim 1, wherein: the SiO is 2 The film microcavity is made of SiO 2 Microdisk or SiO 2 The optical fiber is manufactured by heating and melting at high temperature to form a smooth microcavity under the action of the surface tension of liquid.
6. The apparatus for generating and amplifying a gallery mode laser by exciting a tandem microcavity with a continuous wave light source according to claim 1, wherein: the first transmission optical fiber and the second transmission optical fiber are standard communication quartz optical fiber, plastic optical fiber or nylon optical fiber, and the continuous light source, the first transmission optical fiber, the coupler, the second transmission optical fiber and the amplified gallery mode laser output port are all connected through a connector.
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