CN104518415A - Fiber optical parameter oscillator based on random interval fiber bragg grating intandem - Google Patents
Fiber optical parameter oscillator based on random interval fiber bragg grating intandem Download PDFInfo
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- CN104518415A CN104518415A CN201510023386.2A CN201510023386A CN104518415A CN 104518415 A CN104518415 A CN 104518415A CN 201510023386 A CN201510023386 A CN 201510023386A CN 104518415 A CN104518415 A CN 104518415A
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Abstract
The invention discloses a fiber optical parameter oscillator based on a random interval fiber bragg grating intandem, and belongs to the technical field of fiber lasers. The fiber optical parameter oscillator consists of a tunable laser, a first polarization controller, a phase modulator, a pulse pattern generator, a second polarization controller, an erbium-doped fiber amplifier, an optical isolator, a first circulator, a fiber bragg grating, a high non-linear dispersion displacement fiber, a second circulator, the random interval fiber bragg grating intandem and a third polarization controller. An annular structure is formed by the first circulator, the high non-linear dispersion displacement fiber, the second circulator, the third polarization controller and the fiber bragg grating, and an oscillation cavity is formed together with the random interval fiber bragg grating intandem, so that random laser output is obtained. The fiber optical parameter oscillator has the advantages of compact structure, low threshold value power and the like.
Description
Technical field
The present invention relates to a kind of fiber-optic parametric oscillator, especially relate to a kind of fiber-optic parametric oscillator based on random pitch fiber grating tandem, belong to fiber laser technology field.
Background technology
Gain is high, gain band is roomy owing to having for fiber-optic parametric amplifier, gain ranging is not subject to the features such as material limits, the response time is fast and is subject to people's extensive concern.Fiber-optic parametric oscillator corresponding with it utilizes has the selection that the long resonant cavity of lock chamber realizes tranmitting frequency, obtains Laser output.But, based on our finding, at home and abroad there is no the relevant report of the fiber-optic parametric oscillator based on random feedback at present.
Summary of the invention
The object of the present invention is to provide a kind of fiber-optic parametric oscillator based on random pitch fiber grating tandem, this oscillator utilizes high nonlinear dispersion shifted fiber to produce optical parameter signal, and provide random feedback to realize optical parametric oscillator process by random pitch fiber grating tandem, obtain Random Laser and export.This fiber-optic parametric oscillator has the advantages such as compact conformation, threshold power be low.
The technical solution adopted in the present invention is:
Based on a fiber-optic parametric oscillator for random pitch fiber grating tandem, comprise tunable laser (1), the first Polarization Controller (2), phase-modulator (3), pulse-pattern generator (4), the second Polarization Controller (5), erbium-doped fiber amplifier (6), optical isolator (7), the first circulator (8), fiber grating (9), high nonlinear dispersion shifted fiber (10), the second circulator (11), random pitch fiber grating tandem (12), the 3rd Polarization Controller (13), described tunable laser (1) and the first Polarization Controller (2), phase-modulator (3), second Polarization Controller (5), erbium-doped fiber amplifier (6), optical isolator (7) is connected successively, pulse-pattern generator (4) access phase-modulator (3), optical isolator (7) output is connected with the first circulator Single port (100), first circulator Two-port netwerk (101) is connected with fiber grating (9) one end, first circulator three port (102) successively with high nonlinear dispersion shifted fiber (10), second circulator Single port (103) is connected, second circulator Two-port netwerk (104) is connected with random pitch fiber grating tandem (12) one end, second circulator three port (105) successively with the 3rd Polarization Controller (13), fiber grating (9) other end is connected, random pitch fiber grating tandem (12) other end exports Random Laser signal.
Described the first circulator (8), high nonlinear dispersion shifted fiber (10), the second circulator (11), the 3rd Polarization Controller (13), fiber grating (9) composition loop configuration, form the chamber that vibrates jointly with random pitch fiber grating tandem (12).
Described random pitch fiber grating tandem (12) total length is 2cm ~ 2m, and the fiber grating quantity comprised is 2 ~ 200, and the distance between fiber grating is random, and the reflectivity of single fiber grating is 5% ~ 80%.
The invention has the beneficial effects as follows:
1, the employing of random pitch fiber grating tandem can shorten random feedback effect distance, obtains the laser of compact.
2, by suitably selecting the reflection characteristic of random pitch fiber grating tandem, threshold value can be reduced.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of fiber-optic parametric oscillator based on random pitch fiber grating tandem of the present invention.
Fig. 2 is the structural representation of random pitch fiber grating tandem.
In Fig. 1: 1 is tunable laser; 2 is the first Polarization Controller; 3 is phase-modulator; 4 is pulse-pattern generator; 5 is the second Polarization Controller; 6 is erbium-doped fiber amplifier; 7 is optical isolator; 8 is the first circulator; 9 is fiber grating; 10 is high nonlinear dispersion shifted fiber; 11 is the second circulator; 12 is random pitch fiber grating tandem; 13 is the 3rd Polarization Controller; 100 is the first circulator Single port; 101 is the first circulator Two-port netwerk; 102 is the first circulator three port; 103 is the second circulator Single port; 104 is the second circulator Two-port netwerk; 105 is the second circulator three port.
Embodiment
In Fig. 1, based on a fiber-optic parametric oscillator for random pitch fiber grating tandem, comprise tunable laser 1, first Polarization Controller 2, phase-modulator 3, pulse-pattern generator 4, second Polarization Controller 5, erbium-doped fiber amplifier 6, optical isolator 7, first circulator 8, fiber grating 9, high nonlinear dispersion shifted fiber 10, second circulator 11, random pitch fiber grating tandem the 12, the 3rd Polarization Controller 13, described tunable laser 1 and the first Polarization Controller 2, phase-modulator 3, second Polarization Controller 5, erbium-doped fiber amplifier 6, optical isolator 7 is connected successively, pulse-pattern generator 4 accesses phase-modulator 3, optical isolator 7 output is connected with the first circulator Single port 100, first circulator Two-port netwerk 101 is connected with fiber grating 9, first circulator three port one 02 and high non-linearity dispersive optical fiber 10, second circulator Single port 103 is connected successively, second circulator Two-port netwerk 104 is connected with random pitch fiber grating tandem 12 one end, second circulator three port one 05 successively with the 3rd Polarization Controller 13, fiber grating 9 is connected, random pitch fiber grating tandem 12 other end realizes Random Laser signal and exports.
A kind of operation principle of the fiber-optic parametric oscillator based on random pitch fiber grating tandem:
The laser that tunable laser 1 sends is successively after the first Polarization Controller 2, phase-modulator 3, second Polarization Controller 5, erbium-doped fiber amplifier 6, optical isolator 7, obtain spectrum widening and power amplification, after entering loop configuration by the first circulator Single port 100, the light of specific wavelength is reflected under the effect of fiber grating 9, and exported by the first circulator three port one 02, by there is optical parameter effect during high nonlinear dispersion shifted fiber 10, realize wavelength transfer.Then random pitch fiber grating tandem 12 is entered via the second circulator 11.Utilize random pitch fiber grating tandem 12 to realize the random feedback of special wavelength light in optical parameter signal, feedback light enters loop configuration via the second circulator three port one 05, realizes Random Laser vibration.The other end of random pitch fiber grating tandem 12 exports Random Laser signal.
Embodiment
Embodiments of the invention as shown in Figure 1, wherein tunable laser 1 wavelength is 1559.36nm, and the frequency of pulse-pattern generator 4 is 12.5GHz, and the centre wavelength of fiber grating 9 is 1559.36nm, the zero dispersion point of high nonlinear dispersion shifted fiber 10 is 1559nm, and its length is 1km.As shown in Figure 2, centre wavelength is 1550nm to random pitch fiber grating tandem, and total length is 10cm, is made up of 5 fiber gratings, and the distance between fiber grating is 3 ~ 8mm, and the reflectivity of single fiber grating is 20%.
Output wavelength is tunable laser 1 and first Polarization Controller 2 of 1559.36nm, phase-modulator 3, second Polarization Controller 5, erbium-doped fiber amplifier 6, optical isolator 7 is connected successively, frequency is that the pulse-pattern generator 4 of 12.5GHz accesses phase-modulator 3, optical isolator 7 output is connected with the first circulator Single port 100, first circulator Two-port netwerk 101 and centre wavelength are that the fiber grating 9 of 1559.36nm is connected, first circulator three port one 02 is 1559nm with zero dispersion point successively, length is the high non-linearity dispersive optical fiber 10 of 1km, second circulator Single port 103 is connected, second circulator Two-port netwerk 104 is 10cm with total length, centre wavelength is that the random pitch fiber grating tandem of 1550nm is connected, second circulator three port one 05 successively with the 3rd Polarization Controller 13, fiber grating 9 is connected, random pitch fiber grating tandem 12 other end realizes Laser output.
The laser that the tunable laser 1 of 1559.36nm sends is successively after the first Polarization Controller 2, phase-modulator 3, second Polarization Controller 5, erbium-doped fiber amplifier 6, optical isolator 7, obtain spectrum widening and power amplification, after entering loop configuration by the first circulator Single port 100, the light of 1559.36nm wavelength is reflected under the effect of fiber grating 9, and exported by the first circulator three port one 02, by there is optical parameter effect during high nonlinear dispersion shifted fiber 10, realize wavelength transfer.Then random pitch fiber grating tandem 12 is entered via the second circulator 11.Utilize random pitch fiber grating tandem 12 to realize the random feedback that optical parameter signal medium wavelength is 1550nm light, feedback light enters loop configuration via the second circulator three port one 05, realizes Random Laser vibration.The other end of random pitch fiber grating tandem 12 exports Random Laser signal.
Claims (3)
1., based on a fiber-optic parametric oscillator for random pitch fiber grating tandem, comprise tunable laser (1), the first Polarization Controller (2), phase-modulator (3), pulse-pattern generator (4), the second Polarization Controller (5), erbium-doped fiber amplifier (6), optical isolator (7), the first circulator (8), fiber grating (9), high nonlinear dispersion shifted fiber (10), the second circulator (11), random pitch fiber grating tandem (12), the 3rd Polarization Controller (13), described tunable laser (1) and the first Polarization Controller (2), phase-modulator (3), second Polarization Controller (5), erbium-doped fiber amplifier (6), optical isolator (7) is connected successively, pulse-pattern generator (4) access phase-modulator (3), optical isolator (7) output is connected with the first circulator Single port (100), first circulator Two-port netwerk (101) is connected with fiber grating (9) one end, first circulator three port (102) successively with high nonlinear dispersion shifted fiber (10), second circulator Single port (103) is connected, second circulator Two-port netwerk (104) is connected with random pitch fiber grating tandem (12) one end, second circulator three port (105) successively with the 3rd Polarization Controller (13), fiber grating (9) other end is connected, random pitch fiber grating tandem (12) other end exports Random Laser signal.
2. a kind of fiber-optic parametric oscillator based on random pitch fiber grating tandem according to claim 1, it is characterized in that, described the first circulator (8), high nonlinear dispersion shifted fiber (10), the second circulator (11), the 3rd Polarization Controller (13), fiber grating (9) composition loop configuration, form the chamber that vibrates jointly with random pitch fiber grating tandem (12).
3. a kind of fiber-optic parametric oscillator based on random pitch fiber grating tandem according to claim 1, it is characterized in that, described random pitch fiber grating tandem (12) total length is 2cm ~ 2m, the fiber grating quantity comprised is 2 ~ 200, distance between fiber grating is random, and the reflectivity of single fiber grating is 5% ~ 80%.
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Citations (4)
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|---|---|---|---|---|
| US20040125434A1 (en) * | 2002-09-27 | 2004-07-01 | Prem Kumar | Microstructure fiber optical parametric oscillator |
| CN102749785A (en) * | 2012-07-26 | 2012-10-24 | 浙江师范大学 | Double-pump Fourier domain mode-locked fiber optical parametric oscillator |
| CN102751653A (en) * | 2012-07-19 | 2012-10-24 | 厦门大学 | Photonic crystal fiber based medium-infrared optical fiber parametric oscillator for degenerating four-wave mixing |
| CN204333586U (en) * | 2015-01-16 | 2015-05-13 | 中国计量学院 | A kind of fiber-optic parametric oscillator based on random pitch fiber grating tandem |
-
2015
- 2015-01-16 CN CN201510023386.2A patent/CN104518415A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040125434A1 (en) * | 2002-09-27 | 2004-07-01 | Prem Kumar | Microstructure fiber optical parametric oscillator |
| CN102751653A (en) * | 2012-07-19 | 2012-10-24 | 厦门大学 | Photonic crystal fiber based medium-infrared optical fiber parametric oscillator for degenerating four-wave mixing |
| CN102749785A (en) * | 2012-07-26 | 2012-10-24 | 浙江师范大学 | Double-pump Fourier domain mode-locked fiber optical parametric oscillator |
| CN204333586U (en) * | 2015-01-16 | 2015-05-13 | 中国计量学院 | A kind of fiber-optic parametric oscillator based on random pitch fiber grating tandem |
Non-Patent Citations (2)
| Title |
|---|
| ZHENGQIAN LUO等: "《Multiwavelength Fiber Optical Parametric Oscillator》", 《IEEE PHOTONICS TECHNOLOGY LETTERS》 * |
| 袁俊伟等: "《基于弱反射FBG串的随机分布反馈掺铒光纤激光器》", 《光电子•激光》 * |
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Application publication date: 20150415 |