WO2017185789A1 - Ensemble d'émission de lumière parallèle à canaux multiples à port de lumière unique - Google Patents

Ensemble d'émission de lumière parallèle à canaux multiples à port de lumière unique Download PDF

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WO2017185789A1
WO2017185789A1 PCT/CN2016/112633 CN2016112633W WO2017185789A1 WO 2017185789 A1 WO2017185789 A1 WO 2017185789A1 CN 2016112633 W CN2016112633 W CN 2016112633W WO 2017185789 A1 WO2017185789 A1 WO 2017185789A1
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Prior art keywords
optical
optical signal
light
mirror
combined
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PCT/CN2016/112633
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English (en)
Chinese (zh)
Inventor
汤学胜
张玓
付永安
胡胜磊
周日凯
刘成刚
孙莉萍
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武汉光迅科技股份有限公司
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Publication of WO2017185789A1 publication Critical patent/WO2017185789A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4213—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being polarisation selective optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/43—Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections

Definitions

  • the invention belongs to the field of optical communication technologies, and in particular relates to a single optical port multiplexed parallel light emitting component.
  • the high-speed multi-channel parallel optical transceiver module is one of the high-bandwidth and large-capacity optical interconnection basic devices in data communication, and has great characteristics such as large communication capacity, low power consumption, and miniaturization.
  • High-speed multi-channel parallel optical emission components are currently mainly used to package multi-channel semiconductor lasers by wavelength division multiplexing/demultiplexing (CWDM) technology in only one optical port output optical component, thereby improving single-ended light.
  • CWDM wavelength division multiplexing/demultiplexing
  • the transmission speed of the port For example, a 4x25Gbps single-mode optical transceiver module in the form of a QSFP28 module package uses four CWDM 25Gbps lasers of different wavelengths to be coupled by a coarse wavelength division multiplexing/demultiplexing technique and a single fiber to realize the transmission and transmission of a single fiber 100Gbps signal.
  • the various solutions used in the industry of wavelength division multiplexing/demultiplexing technologies include: arrayed waveguide grating (AWG) scheme and dielectric thin film filter scheme.
  • AWG arrayed waveguide grating
  • the advantage of AWG is that it has high integration and can be fabricated on the same substrate as the laser chip. It has great advantages in multiplexing and demultiplexing in 4 channels or more, but it has the disadvantages of high cost, high coupling difficulty and large insertion loss.
  • the dielectric film filter solution is currently a large-scale commercial solution with low material cost and good filtering characteristics.
  • the optical path structure of the 4-channel parallel light-emitting component currently used in the prior art in the prior art is shown in FIG. 1 .
  • the laser array 101 is composed of four laser chips of different wavelengths. Multi-channel array with equal channel spacing.
  • the band pass filter assembly 103 corresponds to the passband wavelength of each channel and the wavelength of each channel laser.
  • the band pass filter of each channel in the band pass filter assembly 103 transmits the wavelength in the channel, and the channel is The outer wavelength is reflected.
  • the total reflection mirror 105 totally reflects light of all wavelengths.
  • the glass substrate 104 is glass and other light transmissive materials having good light transmittance.
  • the band pass filter group 103 is mounted on one plane of the glass substrate 104, and the other plane of the glass substrate 104 is mounted with a total reflection mirror 105 that reflects the entire wavelength.
  • the laser array 101 emits four different wavelengths of light, respectively, through the collimating lens group 102 of each channel to become multi-channel collimated light parallel to each other, and the multi-channel collimated light is obliquely incident on the band pass filter group at a certain incident angle.
  • the band pass filters of the respective channels in 103 are transmitted into the glass substrate 104, reflected by the total reflection mirror 105, and reflected by the band pass filter group 103 for non-passband wavelength light, and the light is incident on the inner edge of the glass substrate 104.
  • the beams of all of the channels substantially coincide at the exit of the glass substrate 104, are incident on the coupled output lens 106, and are coupled into the optical fiber 107.
  • the above-mentioned multi-channel parallel light-emitting component structure based on the dielectric thin film filter scheme has a significant disadvantage: the optical path elapsed from the laser array to the coupling into the optical fiber has a large difference, and the optical waves and optical fibers of different channels are different. There are significant differences in coupling efficiency.
  • the present invention provides a single-port multi-channel parallel light emitting component, which has small optical path difference, high optical path coupling efficiency, small wavelength-dependent loss, relatively simple assembly process, and relatively low cost. It can be applied to the transmission of optical signals of various rate QSFP+ optical modules including 40Gb/S and 100Gb/S.
  • the main object of the present invention is to provide a single optical port multipath Parallel light emitting components.
  • the present invention provides a single optical port multiplexed parallel light emitting device, which is provided with a laser chip array, an optical path translating polygon mirror, a first mirror and a second mirror, a half wave plate, and a polarization beam combining mirror according to an optical path;
  • the laser chip arrays are arranged side by side in parallel according to the central wavelength, and emit optical signals ⁇ 1 , ⁇ 2 , ⁇ 3 , ⁇ 4 having the same polarization state corresponding to the four optical channels;
  • the optical path translating polygon mirror realizes beam cross-translation of the optical signal ⁇ 2 and the optical signal ⁇ 3 , and the first mirror and the second mirror respectively deflect the beam directions of the optical signal ⁇ 1 and the optical signal ⁇ 4 to make the optical signal ⁇ 1 and the optical signal ⁇ 3 are combined to form a combined optical signal [ ⁇ 1 , ⁇ 3 ], and the optical signal ⁇ 2 and the optical signal ⁇ 4 are combined to form a combined optical signal [ ⁇ 2 , ⁇ 4 ];
  • the polarization states of the combined optical signals [ ⁇ 1 , ⁇ 3 ] and the polarization states of the combined optical signals [ ⁇ 2 , ⁇ 4 ] are perpendicular to each other, and the combined optical signals are combined by the polarization beam combiner [ ⁇ ] 1 , ⁇ 3 ] is combined with the combined optical signals [ ⁇ 2 , ⁇ 4 ] to form a combined optical signal [ ⁇ 1 , ⁇ 2 , ⁇ 3 , ⁇ 4 ].
  • the laser chip array is an array of a plurality of discrete different wavelength laser chips or an array of a plurality of light emitting unit laser chips having different wavelengths, and the wavelength of each optical channel satisfies IEEE 802.3ba.
  • the different CWDM wavelengths specified by the specification, or any other wavelengths having a larger wavelength interval, are arranged side by side in parallel in the order of long wavelength to short wavelength or from short wavelength to long wavelength.
  • a collimating lens array is further included, and the collimating lens array corresponds to the laser chip array, and the light beams for the optical signals of the respective optical channels are collimated.
  • the incident light-passing surface S1 and the incident light-passing surface S2 of the optical path translating polygon mirror respectively correspond to the optical signals ⁇ 2 and the optical signals ⁇ 3 emitted by the two lasers disposed in the middle of the laser chip array.
  • the optical signal ⁇ 2 and the optical signal ⁇ 3 are respectively refracted to realize the cross-translation, and then respectively projected to the outgoing light-passing surface S4 and the outgoing light-passing surface S3 of the optical path translating polygon mirror.
  • the reflective surface of the first mirror plated with the single polarization high-reflection film is parallel to the exit light-passing surface S4 of the optical path translating polygon mirror, and the optical signal ⁇ 4 is reflected by the first mirror Then, the projection point on the exiting light-passing surface S4 of the optical path translating polygon mirror and the optical signal ⁇ 2 are refracted by the incident light-passing surface S1 of the optical path translating polygon mirror and projected onto the projection point position on the outgoing light-passing surface S4.
  • the reflection surface of the second mirror coated with the single polarization high reflection film is parallel to the exit light passing surface S3 of the optical path translating polygon mirror, and the optical signal ⁇ 1 after the second mirror is reflected, the projection point on the exiting light-passing surface S3 of the optical path translating polygon mirror and the optical signal ⁇ 3 are refracted by the incident light-passing surface S2 of the optical path translating polygon mirror, and then projected to the exit
  • the projection points on the light-passing surface S3 are coincident to achieve the combination of the optical signal ⁇ 1 and the optical signal ⁇ 3 .
  • the incident light-passing surface S1 and the outgoing light-passing surface S4 of the optical path translation polygon mirror are parallel to each other, and the incident light-passing surface S1 corresponding to the optical signal ⁇ 2 is coated with an anti-reflection film, and the light-emitting surface is emitted.
  • S4 is plated with a low-pass filter film or a high-pass filter film, and the wavelengths of the optical signal ⁇ 2 and the optical signal ⁇ 4 are respectively located in the transmission band of the low-pass filter film or the high-pass filter film on the light-emitting surface S4.
  • the incident light-passing surface S2 and the outgoing light-passing surface S3 of the optical path translating polygon mirror are parallel to each other, and the incident light-passing surface S2 corresponding to the optical signal ⁇ 3 is coated with an anti-reflection film, and the outgoing light-passing surface S3 is plated with
  • the low-pass filter film or the high-pass filter film, the wavelengths of the optical signal ⁇ 1 and the optical signal ⁇ 3 are respectively located on the reflection band and the transmission band of the spectrum of the high-pass filter film or the low-pass filter film on the light-emitting surface S3.
  • the two light-passing surfaces of the half-wave plate are plated with an anti-reflection film, the main section of the optical axis and the combined optical signal [ ⁇ 1 , ⁇ 3 ] and the combined optical signal [ ⁇ 2
  • the polarization plane of ⁇ 4 ] is at an angle of 45°.
  • the incident surface S5 and the exit surface S8 of the polarization beam splitter are parallel to each other, and are coated with an anti-reflection film;
  • the reflective surface S6 corresponding to the half-wave plate is plated with a single polarization high-reflection film;
  • the polarization direction is perpendicular to the polarization direction of the optical signal emitted by the laser chip array;
  • the bonding plane S7 of the polarization beam combining mirror is plated with a polarization beam splitting film such that the polarization state is perpendicular to the optical signal emitted by the laser chip array.
  • the optical signal of the polarization direction is reflected at the bonding plane S7 such that the optical signal whose polarization state is parallel to the polarization direction of the optical signal emitted by the laser chip array is transmitted at the bonding plane S7.
  • the bonding plane S7 and the reflecting surface S6 of the polarization beam combining mirror are parallel to each other, and cooperatively translate the incident combined optical signal [ ⁇ 1 , ⁇ 3 ] and the combined optical signal [ ⁇ 2 , ⁇ 4 ] One, achieving polarization combining of the combined optical signal [ ⁇ 1 , ⁇ 3 ] and the combined optical signal [ ⁇ 2 , ⁇ 4 ] on the bonding plane S7.
  • the optical isolator is a polarization-independent optical isolator for performing reverse isolation of output light.
  • the invention has the beneficial effects that the optical path difference of each optical channel is small, the optical path coupling efficiency is high, the optical path coupling efficiency of each optical channel is similar, the wavelength dependent loss is small, the assembly process is relatively simple, and the invention is relatively low. the cost of.
  • FIG. 1 is a schematic diagram of an optical path structure of a prior art 4-channel parallel light emitting component
  • FIG. 2 is a schematic structural view of a preferred embodiment of the present invention.
  • 3 is a transmission spectrum curve of an optical path translating polygon mirror S4 according to an embodiment of the present invention.
  • 5 is a transmission spectrum curve of an optical path translating polygon mirror S3 according to an embodiment of the present invention.
  • 6 is a surface reflection spectrum curve of an optical path translating polygon mirror S3 according to an embodiment of the present invention.
  • Laser array 102 collimating lens group
  • the present invention provides a single optical port multi-channel parallel light emitting component, which will be 4 After the beams of the different wavelength LD illuminating units are collimated, the non-adjacent optical channels are first combined by the special wavelength division multiplexed optical paths, and then the polarization combining converges to the same optical output port.
  • FIG. 2 A preferred embodiment of the present invention is illustrated in Figure 2, including a laser chip array in accordance with the optical path setting Column 1, collimating lens array 2, optical path translating polygon mirror 3, mirrors 4 and 5, half wave plate 6 (HWP), polarization beam combining mirror 7 (PBC), optical isolator 8, coupled output lens 9 and coupled output Optical fiber 10.
  • HWP half wave plate 6
  • PBC polarization beam combining mirror 7
  • optical isolator 8 coupled output lens 9 and coupled output Optical fiber 10.
  • the laser chip array 1 is four lasers (LD) arranged side by side, and the center wavelengths ⁇ 1 , ⁇ 2 , ⁇ 3 , ⁇ 4 are arranged in parallel from the long wave to the short wave or from the short wave to the long wave, and the polarization state thereof is parallel to the laser chip array. 1 side by side plane.
  • LD lasers
  • the collimating lens array 2 corresponds to the laser chip array 1 and is used for collimation of the outgoing beams of the lasers of the respective channels.
  • the optical path translating polygon mirror 3 is disposed between the collimating lens array 2 and the half wave plate 6/polarizing beam combining mirror 7, and the two light passing surfaces S1 and S2 of the optical path translating polygon mirror 3 are respectively disposed in the middle of the laser chip array 1.
  • the optical signals of the wavelengths ⁇ 2 and ⁇ 3 emitted by the two lasers correspond to the cross-translation of the beams of the collimated optical signals ⁇ 2 and ⁇ 3 .
  • the high-reverse faces of the mirror 4 and the mirror 5 respectively correspond to the optical signals of the wavelengths ⁇ 4 and ⁇ 1 emitted from the two lasers disposed on both sides of the laser chip array 1 for reflecting the collimated optical signal ⁇ 4 And ⁇ 1 .
  • the high side of the mirror 4 is further parallel with the light signal ⁇ 2 exit surface S4 of the optical path translating polygon mirror 3
  • the high back surface of the mirror 5 is parallel to the light signal ⁇ 3 exit surface S3 of the optical path translating polygon mirror 3. .
  • the mirror 4 and the optical path translating polygon mirror 3 cooperate to combine the optical signals ⁇ 1 and ⁇ 3 into optical signals [ ⁇ 1 , ⁇ 3 ]; the mirror 5 and the optical path translating polygon mirror 3 cooperate to combine the optical signals ⁇ 2 And ⁇ 4 are combined into an optical signal [ ⁇ 2 , ⁇ 4 ].
  • the half-wave plate 6 is placed on the side of the reflecting surface S6 of the polarization beam combining mirror 7, corresponding to the combined optical signal [ ⁇ 1 , ⁇ 3 ] or the combined optical signal [ ⁇ 2 , ⁇ 4 ], as shown in FIG. 2 half-wave plate 6 and the combined optical signal [ ⁇ 1, ⁇ 3] corresponding to an example, the optical path of the combined light signal [ ⁇ 1, ⁇ 3] to enter the polarization beam mirror 7, a combination of the optical signal passes through half wave plate 6 [ ⁇ 2 , ⁇ 4 ] does not pass through the half-wave plate 6 and directly enters the polarization beam combining mirror 7.
  • the polarization beam combining mirror 7 is disposed between the half wave plate 6 and the optical isolator 8, and realizes that the combined optical signals [ ⁇ 1 , ⁇ 3 ] are combined with the combined optical signals [ ⁇ 2 , ⁇ 4 ].
  • the combined optical signals [ ⁇ 1 , ⁇ 2 , ⁇ 3 , ⁇ 4 ] enter the optical isolator 8 and are coupled into the coupled output optical fiber 10 via a coupling output lens 9.
  • the laser chip array 1 has a light emitting unit, wherein the laser chip array 1 is an array composed of a plurality of discrete different wavelength laser chips or an array of a plurality of light emitting unit laser chips having different wavelengths, each channel
  • the wavelength may be a different CWDM wavelength that satisfies the IEEE802.3ba specification, or any other wavelength with a larger wavelength interval, from long wave to short wave or from short wave to long wave in parallel.
  • the light-passing surfaces S1 and S4 of the optical path translating polygon mirror 3 are parallel to each other, the incident light-passing surface S1 corresponding to the optical signal ⁇ 2 is coated with an anti-reflection film, and the outgoing light-passing surface S4 is plated with a low-pass (SWP: Short Wave) Pass) or high-pass filter (LWP: Long Wave Pass), the optical signals ⁇ 2 and ⁇ 4 are respectively located in the transmission band and the reflection band of the filter film spectrum at the operating wavelength ⁇ 1 ⁇ 2 ⁇ 3 ⁇ 4
  • the transmittance curve and the reflectance curve are as shown in FIGS. 3 and 4, respectively.
  • the light-passing surfaces S2 and S3 of the optical path translating polygon mirror 3 are parallel to each other, the incident light-passing surface S2 corresponding to the optical signal ⁇ 3 is coated with an anti-reflection film, and the outgoing light-passing surface S3 is plated with a high-pass or low-pass filter film.
  • the optical signals ⁇ 3 and ⁇ 1 are respectively located in the transmission band and the reflection band of the filter film spectrum, and the working wavelength ⁇ 1 ⁇ ⁇ 2 ⁇ ⁇ 3 ⁇ ⁇ 4 is taken as an example for description, and the outgoing light-passing surface S3 is plated with high pass and low reverse.
  • the film, the transmittance curve and the reflectance curve are shown in Figures 5 and 6, respectively.
  • the exit light-passing surface S4 is plated with a high-pass low-reflection film, and the outgoing light-passing surface S3 is plated with a low-pass high-reflection film.
  • the high-reverse surface of the mirror 4 is plated with a single-polarization high-reflection film, and the reflected light on the high-reverse surface is substantially unchanged from the incident light.
  • the high-reverse surface of the mirror 4 is parallel to the light-transmitting surface S4 of the optical signal ⁇ 2 on the optical path translating polygon mirror 3.
  • the position of the mirror 4 is configured in the following positional relationship: after the optical signal ⁇ 4 is reflected by the mirror 4, the reflected light is projected on the light-passing surface S4 of the optical path translating polygon mirror 3 and the optical signal ⁇ 2 is translated by the optical path.
  • the positions of the light spots projected onto the light-passing surface S4 after the light-passing surface S1 of the mirror 3 is refracted substantially coincide.
  • the high-reverse surface of the mirror 5 is plated with a single-polarization high-reflection film, and the reflected light on the high-reverse surface is substantially unchanged from the incident light.
  • the high-reverse surface of the mirror 5 is parallel to the light-transmitting surface S3 of the optical signal ⁇ 3 on the optical path translating polygon mirror 3.
  • the position of the mirror 5 is configured in the following positional relationship: after the optical signal ⁇ 1 is reflected by the mirror 5, the reflected light is projected on the light-passing surface S3 of the optical path translating polygon mirror 3 and the optical signal ⁇ 3 is translated by the optical path.
  • the positions of the light spots projected onto the light-passing surface S3 after the light-passing surface S2 of the mirror 3 is refracted substantially coincide.
  • the two light-passing surfaces of the half-wave plate 6 are plated with an anti-reflection film, and the front and rear surfaces of the two light-passing plates are plated with an anti-reflection film, so that the main section of the optical axis of the half-wave plate 6 and the combined optical signal are [
  • the polarization planes of ⁇ 1 , ⁇ 3 ] and [ ⁇ 2 , ⁇ 4 ] are at an angle of 45°, so that when linearly polarized light is incident perpendicularly to the half-wave plate 6, the transmitted light is still linearly polarized, if linearly polarized at the time of incidence
  • the angle between the vibration surface and the main section of the crystal of the half-wave plate 6 is ⁇ (45°), and the vibration plane of the transmitted linearly polarized light is rotated by the 2 ⁇ angle (90°) from the original orientation.
  • the half-wave plate 6 in Fig. 2 is used to rotate the polarization state of the combined optical signal [ ⁇ 1 , ⁇ 3 ] into a polarization of the substantially vertically combined optical signal [ ⁇ 2 , ⁇ 4 ].
  • the combined optical signal [ ⁇ 1 , ⁇ 3 ] passing through the half-wave plate 6 is the S-polarized state
  • the combined optical signal that has not passed through the half-wave plate 6 [ ⁇ ] 2 , ⁇ 4 ] is a P polarization state.
  • the incident surface S5 and the exit surface S8 of the polarization beam combining mirror 7 are parallel to each other, and are coated with an anti-reflection film.
  • the reflective surface S6 corresponding to the half-wave plate 6 is plated with a S-state single polarization high-reflection film, which is substantially unchanged.
  • the bonding plane S7 is plated with a polarization splitting film, and the optical signal (S-polarized state) whose polarization state is perpendicular to the light-emitting unit of the laser chip array 1 is reflected on the surface, and the polarization state is parallel to the optical signal of the light-emitting unit of the laser chip array 1 ( The P polarization state is completely transmitted on the surface.
  • the polarization beam combining mirror 7 and the bonding plane S7 and the reflecting surface S6 are parallel to each other, cooperatively translate the incident combined optical signal [ ⁇ 1 , ⁇ 3 ], and realize the combined optical signal [ ⁇ 1 , ⁇ 3 ] and the combined optical signal [ ⁇ ] 2 , ⁇ 4 ] is combined on the gluing plane S7.
  • the optical isolator 8 is a polarization-independent optical isolator for realizing reverse isolation of output light.
  • the laser chip array 1 emits four different wavelength optical signals whose polarization states are parallel to the side-by-side plane of the laser chip array, such as the P-polarization state.
  • the optical signal ⁇ 1 is deflected on the reflected light path of the mirror 5, and the reflected light is projected onto the surface of the light-passing surface S3 of the optical path translating polygon mirror 3; the optical signal ⁇ 3 is also refracted through the optical path translating polygon mirror light-emitting surface S2 Smooth surface S3.
  • the position of the projection point of the optical signal ⁇ 1 and the optical signal ⁇ 3 substantially coincides on the light-passing surface S3 of the optical path translating polygon mirror.
  • the exit light-passing surface S3 is plated with a low-pass or high-pass filter film, and the wavelengths of the light signals ⁇ 3 and ⁇ 1 are respectively located in the transmission band and the reflection band of the spectrum of the filter film, so that the light signal ⁇ is reflected on the surface of the light-passing surface S3. 1 and the refracted optical signal ⁇ 3 are easily combined to form a combined optical signal [ ⁇ 1 , ⁇ 3 ].
  • the optical signal ⁇ 4 and the optical signal ⁇ 2 have the same combining process: the optical signal ⁇ 4 is deflected on the reflected light path of the mirror 4, and the reflected light is projected onto the surface of the light-transmitting surface S4 of the optical path translating polygon mirror 3; the optical signal ⁇ 2 Then, the light-passing surface S1 of the optical path translating polygon mirror 3 is refracted and projected onto the surface of the light-passing surface S4. The position of the projection point of the optical signal ⁇ 4 and the optical signal ⁇ 2 on the light-passing surface S4 of the optical path translating polygon mirror 3 substantially coincides.
  • the exit light-passing surface S4 is plated with a low-pass or high-pass filter film, and the wavelengths of the light signals ⁇ 3 and ⁇ 1 are respectively located in the transmission band and the reflection band of the filter film spectrum, and the reflected light signal ⁇ 4 and the refracted light signal ⁇ 2 Combining is performed on the outgoing light-passing surface S4 to form a combined optical signal [ ⁇ 1 , ⁇ 3 ].
  • the polarization state is converted into the S polarization state, and the combined optical signal [ ⁇ 1 , ⁇ 3 ] is deflected on the high-reflection surface S6 of the polarization beam splitter 7 to be deflected, and the reflected light is projected onto the bonding plane S7 of the polarization beam combining mirror 7;
  • the combined optical signal [ ⁇ 2 , ⁇ 4 ] is refracted onto the bonding plane S7 via the incident surface S5 of the polarization beam combining mirror 7.
  • the combined light signals [ ⁇ 1 , ⁇ 3 ] on the bonding plane S7 of the polarization beam combining mirror 7 and the projection point positions of the combined light signals [ ⁇ 2 , ⁇ 4 ] substantially coincide.
  • the polarization beam combiner mirror 7 is coated with a polarization splitting film, and the combined light signal [ ⁇ 1 , ⁇ 3 ] of the S polarization state and the combined light signal [ ⁇ 2 , ⁇ 4 ] of the P polarization state are combined.
  • the combined optical signals [ ⁇ 1 , ⁇ 2 , ⁇ 3 , ⁇ 4 ] enter the optical isolator 8 and are finally coupled into the coupled output fiber 10 through the coupling output lens 9.
  • the wavelength interval of the combined optical signals can be effectively increased, which is advantageous for filtering the light reflections of the light-passing surfaces S3 and S4 of the polygon mirror 3 in the optical path.
  • the film has a higher signal-to-noise suppression ratio; the convergence of the polarization beam to the same light output port can simplify the assembly difficulty, reduce the optical path difference of each optical channel, and improve the optical path coupling efficiency.
  • the present invention provides a single-port multi-channel parallel light emitting component, which has small optical path difference, high optical path coupling efficiency, small wavelength-dependent loss, and relatively simple assembly process. Has a relatively low cost.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
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Abstract

L'invention concerne un ensemble d'émission de lumière parallèle à canaux multiples à port de lumière unique, comprenant un réseau de puces laser (1), un réseau de lentilles de collimation (2), un miroir polygonal de translation de trajet optique (3), un miroir réfléchissant (4, 5), une plaque demi-onde (6), un combineur de faisceaux de polarisation (7), un isolateur optique (8), une lentille de sortie couplée (9) et une fibre optique de sortie couplée (10). Après que des faisceaux lumineux à quatre canaux ayant des longueurs d'onde différentes provenant d'une unité d'émission de lumière laser sont collimatés, chaque deux faisceaux lumineux de canaux optiques non adjacents sont d'abord combinés par un trajet optique de multiplexage par répartition en longueur d'onde spécial, puis polarisés et combinés dans le même port de sortie de lumière, de façon à réaliser la combinaison de quatre signaux optiques ayant des longueurs d'onde différentes en utilisant de manière exhaustive des films de filtrage de lumière de deux surfaces de transmission de lumière sur le miroir polygonal de translation de trajet optique (3), le miroir réfléchissant (4, 5), et la fonction de polarisation et de combinaison de faisceaux du combinateur de faisceaux de polarisation (7). Les trajets optiques des signaux optiques des canaux respectifs sont légèrement différents, et peuvent être couplés de manière efficace, avec des processus d'assemblage simples, et de faibles consommation et coût liés à la longueur d'onde. L'invention peut être appliquée à l'émission de signaux optiques à partir de modules optiques QSFP+ ayant différents débits, y compris 40 Gb/S et 100 Gb/S.
PCT/CN2016/112633 2016-04-25 2016-12-28 Ensemble d'émission de lumière parallèle à canaux multiples à port de lumière unique WO2017185789A1 (fr)

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CN201610259483.6A CN105717589B (zh) 2016-04-25 2016-04-25 一种单光口多路并行光发射组件
CN201610259483.6 2016-04-25

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WO2017185789A1 true WO2017185789A1 (fr) 2017-11-02

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