CN1391321A - DWDM laser with wavelength selective tuning - Google Patents
DWDM laser with wavelength selective tuning Download PDFInfo
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- CN1391321A CN1391321A CN 02138785 CN02138785A CN1391321A CN 1391321 A CN1391321 A CN 1391321A CN 02138785 CN02138785 CN 02138785 CN 02138785 A CN02138785 A CN 02138785A CN 1391321 A CN1391321 A CN 1391321A
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Abstract
A dense wave division multiplexer laser device with wavelength selectable tuning is composed of coupling optical fibre, laser diode (LD) chiop, collimation lens, filter array and reflector driven by micromotor, and micromotor. Its advantages are low cost, high performance stability and simple structure.
Description
Technical field
The present invention relates to the dense wave division multipurpose fiber optic communication field, but particularly a kind of wavelength selecting tuning dense wave division multipurpose laser.Hereinafter, dense wave division multipurpose is called for short DWDM.
Background technology
Semiconductor laser is one of Primary Component of optical communication system.The semiconductor laser of using in optical communication system at present all is fixed wave length output.And in optical-fiber network, use dozens or even hundreds of wavelength based on the DWDM technology.For present semiconductor laser preparation technology, this just need be at each wavelength design special production technology, and wavelength as requested prepares semiconductor laser, and its cost will be very high.Therefore, the semiconductor laser of research and development tunable wave length is subjected to extensive attention.
For example: have in the tunable semiconductor laser invention that has proposed: 1) Deacon equals U.S.'s patent of invention " Channel-switched tunable laser for DWDM communications (patent No. 6; 373; 872) " of in April, 2002 application, this patent utilization semiconductor optical amplifier (SOA) selects element to combine with the hot light grating reflector of Polymer, waveguide optical grating or electrooptic crystal equiwavelength, constitutes channel wavelength selecting tuning DWDM laser; 2) Koren equals U.S.'s patent of invention " Wavelength-selectable fiber ring laser (patent No. 6; 134; 250) " of in October, 2000 application, this patent utilization Fabry-Periot N-type semiconductor N image intensifer (FP-SOA) is as arrowband mode selector in fiber optic loop an actor's rendering of an operatic tune, realize stable single longitudinal mode ring cavity fiber laser, and be used among the array waveguide grating router; 3) Scobey equals U.S.'s patent of invention " External cavity semiconductor laser with monolithic prism assembly (patent No. 6; 115; 401) " of in September, 2000 application, and this patent adopts laser diode semiconductor gain media, position-movable monolithic prism method Bu-Bai Luo filter to constitute external-cavity semiconductor laser.Low-angle of the one side of prism and optical axis folder, it is long to change the filter chamber by lateral displacement, thereby realizes the wavelength continuous tuning of no mode hopping.
The common issue with of above-mentioned patent: the one, structure is comparatively complicated, and service behaviour is difficult to stablize; The 2nd, when system applies, must design the Wavelength stabilized system of a cover, comprise links such as wavelength detection, FEEDBACK CONTROL, adjusting wavelength, with the locked laser diode output wavelength; The 3rd, the filter unit temperature influence is bigger, need add temperature control during system applies, and cost is higher.
Summary of the invention:
Technical problem to be solved by this invention is: overcome above-mentioned prior art problems, provide a kind of wavelength of can realizing according to the dense wave division multipurpose standard of wavelength of International Telecommunication Association's organization prescribed can select the method for tuning filtering, but utilize this method to realize a kind of dense wave division multipurpose laser of wavelength selecting tuning, this laser can be used as the light source of DWDM optical fiber telecommunications system optical transmission module, perhaps as dwdm system tester light source.
The technical scheme that the present invention solves its technical problem is: provide a kind of wavelength can select the tuning filtering method, that is: dense wave division multipurpose narrow-band filter array and the speculum that is driven by collimating lens, electrical micro-machine constitutes reflective collimation filtering light path.But the step that realizes the wavelength selecting tuning is asked for an interview embodiment.
Hereinafter, the dense wave division multipurpose narrow-band filter array is called for short filter arrays.
The present invention is according to said method, but a kind of DWDM laser of wavelength selecting tuning is proposed, its structure comprises that coupled fiber, semiconductor laser diode chip are the filter arrays and the speculum of LD chip, collimating lens, electrical micro-machine driving, their light path connections successively, and be sealed in the shell.
Method provided by the invention and invention laser have following major advantage:
One. reflective collimation filtering light path performance is not subjected to filter to regulate deviation effects, job stability height.
They are two years old. and wavelength tuning mechanism is simple, helps reducing the wavelength tuning cost.
They are three years old. and tuning wavelength does not need Wavelength stabilized system from locking.
They are four years old. and laser wavelength temperature drift is low, does not need temperature control system.
They are five years old. and the system applies cost is low.
Description of drawings
Fig. 1 is the structural representation of DWDM laser provided by the invention.
Fig. 2 is DWDM narrow band pass filter 6 circumferential arrangement schematic diagrames among Fig. 1.
Fig. 3 is DWDM narrow band pass filter 6 arranged schematic diagrames among Fig. 1.
Fig. 4 is the structure enlarged diagram of DWDM narrow band pass filter 6 among Fig. 2 or Fig. 3.
Embodiment
One. wavelength provided by the invention can be selected tuning filtering method embodiment
The dense wave division multipurpose narrow-band filter array and the speculum that are driven by collimating lens, electrical micro-machine constitute reflective collimation filtering light path, but and realize the wavelength selecting tuning by following step:
A. incident light is through collimating lens 5 collimations.
B. collimated light is by the DWDM narrow band pass filter 6 in the filter arrays.
C. the light that sees through DWDM narrow band pass filter 6 is again by speculum 9 reflections.
D. reverberation passes through DWDM narrow band pass filter 6 once more along original optical path.
E. the light that sees through DWDM narrow band pass filter 6 is assembled by collimating lens 5 again, is back to the incident end, constitutes reflective collimation filtering light path.
F. drive filter arrays by electrical micro-machine 8, select to place the filter 6 of light path, the realization wavelength can be selected tuning filtering.
Two. wavelength provided by the invention can be selected the DWDM laser embodiment of tuning filtering
The semiconductor laser of in dwdm system, using, its output wavelength does not need continuous tuning, and the standard of wavelength that only need meet the G.692 agreement defined that ITU-T formulates gets final product.Based on this kind consideration, the present invention proposes the changeable tuning DWDM laser of channel wavelength as shown in Figure 1, it can satisfy dwdm optical communication network application requirement on the one hand fully, then reduce the technical difficulty of wavelength tuning, locking and steady operation on the other hand greatly, help reducing the cost of wavelength tuning.
The DWDM laser that the present invention proposes, it utilizes the narrow-band filtering modeling principle chamber in, mixes integratedly with the tunable reflective filter of DWDM by the LD chip, can simplify laser structure like this, the raising device stability; Utilize speculum and LD chip in the DWDM wavelength selecting tuning reflector to increase anti-end face formation resonant cavity; Utilization places the DWDM narrow band pass filter of resonant cavity to select the resonance wavelength of laser, swashs to penetrate light and exported by coupled fiber; By electrical micro-machine rotation DWDM narrow band pass filter or DWDM narrow-band filter array, it is tuning to realize that wavelength channel switches.
The structure of example DWDM laser of the present invention is as shown in Figure 1: comprise that coupled fiber 1, semiconductor laser diode chip are filter arrays and the speculum 9 that LD chip 3, collimating lens 5, electrical micro-machine 8 drive, their light path connections successively, and be sealed in the shell 10.
Above-mentioned LD chip 3, two cleavage surface are coated with partial reflection blooming 2 and desirable anti-reflection blooming 4 respectively, the face of these two bloomings respectively with coupled fiber 1, reflective auto-collimation filtering light path in collimating lens 5 light paths connect.Speculum 9 in partial reflection blooming 2 and the reflective collimation filtering light path constitutes laser resonant cavities, and a DWDM narrow band pass filter 6 in the filter arrays places in the resonant cavity, and this filter is to drive loading plates 7 by electrical micro-machine 8 to select.As Fig. 2, shown in Figure 3: above-mentioned filter arrays, can be connected in the loading plate by DWDM narrow band pass filter 6 embeddings that several centre wavelength meets International Telecommunication Association's organizational standard and constitute, loading plate 7 can be circular slab 11 or rectangular slab 12, it is driven by electrical micro-machine 8.
As shown in Figure 4: above-mentioned DWDM narrow band pass filter 6 is a kind of Solid Cavity Fabry-Bai Luo narrow-band interference filters, and it is made of the broadband reflection film 13,15 that is coated with on an otpical leaf 14 and two optical surface, has the narrowband optical of realization filter function.The otpical leaf 14 of this narrow band pass filter adopts the optical material of low temperature drift to utilize the precision optics manufacturing process to make, and has determined the excitation wavelength of DWDM laser of the present invention, and wavelength stability can reach 0.001nm/ ℃.Therefore, DWDM laser output wavelength of the present invention has self-locking function, need not adopt any Wavelength stabilized measure in system applies, helps reducing the system applies cost.
Below, sketch the course of work of DWDM laser of the present invention:
The broadband spontaneous emission light of the amplification that LD chip 3 produces when injection current is via anti-reflection face 4 outputs, become directional light through collimating lens 5, by reflecting by speculum 9 again after the DWDM narrow band pass filter in the filter arrays 76, return along original optical path, constitute reflective auto-collimation filtering.LD chip 3 increase the resonant cavity that anti-face 2 and speculum 9 constitutes lasers, utilize the DWDM narrow band pass filter 6 that places resonant cavity to select the resonance wavelength of laser, form to swash and penetrate light and by coupled fiber 1 output.Utilize electrical micro-machine 8 to drive filter arrays, select the DWDM narrow band pass filter 6 of necessary wavelength correspondence, and be placed in the laser resonant cavity, realize DWDM laser wavelength selecting tuning.
Claims (8)
1. a wavelength can be selected the tuning filtering method, it is characterized in that: the dense wave division multipurpose narrow-band filter array and the speculum (9) that are driven by collimating lens (5), electrical micro-machine (8) constitute reflective collimation filtering light path, and, but realize the wavelength selecting tuning by following step, wherein, dense wave division multipurpose is hereinafter to be referred as DWDM, and the dense wave division multipurpose narrow-band filter array is hereinafter to be referred as filter arrays:
A. incident light collimates through collimating lens (5);
B. collimated light is by the DWDM narrow band pass filter (6) in the filter arrays;
C. the light that sees through DWDM narrow band pass filter (6) is reflected by speculum (9) again;
D. reverberation passes through DWDM narrow band pass filter (6) once more along original optical path;
E. the light that sees through DWDM narrow band pass filter (6) is assembled by collimating lens (5) again, is back to the incident end, constitutes reflective collimation filtering light path;
F. drive filter arrays by electrical micro-machine (8), select to place the filter (6) of light path, the realization wavelength can be selected tuning filtering.
2. DWDM laser according to the preparation of the described method of claim 1, but the DWDM laser that it is characterized in that a kind of wavelength selecting tuning, comprise that coupled fiber (1), semiconductor laser diode chip are the filter arrays and the speculum (9) of LD chip (3), collimating lens (5), electrical micro-machine (8) driving, their light path connections successively, and be sealed in the shell (10).
3. DWDM laser according to claim 2, it is characterized in that described LD chip (3), two cleavage surface is coated with partial reflection blooming (2) and desirable anti-reflection blooming (4) respectively, the face of these two bloomings respectively with coupled fiber (1), reflective auto-collimation filtering light path in collimating lens (5) light path connect.
4. DWDM laser according to claim 3 is characterized in that the speculum (9) in partial reflection blooming (2) and the reflective collimation filtering light path constitutes laser resonant cavity, and the DWDM narrow band pass filter (6) in the filter arrays places in the resonant cavity.
5. according to claim 2 or 4 described DWDM lasers, it is characterized in that filter arrays, meet DWDM narrow band pass filter International Telecommunication Association's organizational standard, that evenly arrange (6) by several centre wavelengths and constitute, and, connect with loading plate (7) embedding; Drive loading plate (7) by electrical micro-machine (8), select a DWDM narrow band pass filter (6) to place in the laser resonant cavity.
6. DWDM laser according to claim 5 is characterized in that loading plate (7) is circular slab (11) or rectangular slab (12).
7. DWDM laser according to claim 5, it is characterized in that DWDM narrow band pass filter (6) is a kind of Solid Cavity Fabry-Bai Luo narrow-band interference filter, it is made of the broadband reflection film (13) that is coated with on an otpical leaf (14) and two optical surface, (15).
8. DWDM laser according to claim 7 is characterized in that described otpical leaf (14), is made by the optical material of low temperature drift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02138785 CN1200497C (en) | 2002-07-12 | 2002-07-12 | DWDM laser with wavelength selective tuning |
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| CN 02138785 CN1200497C (en) | 2002-07-12 | 2002-07-12 | DWDM laser with wavelength selective tuning |
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| CN1391321A true CN1391321A (en) | 2003-01-15 |
| CN1200497C CN1200497C (en) | 2005-05-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048279A (en) * | 2015-07-30 | 2015-11-11 | 中国科学院长春光学精密机械与物理研究所 | Semiconductor laser light source output device for alkali metal vapor laser device pumping |
| CN112260056A (en) * | 2020-10-22 | 2021-01-22 | 中国科学院国家授时中心 | Fast frequency tuning external cavity semiconductor laser |
-
2002
- 2002-07-12 CN CN 02138785 patent/CN1200497C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048279A (en) * | 2015-07-30 | 2015-11-11 | 中国科学院长春光学精密机械与物理研究所 | Semiconductor laser light source output device for alkali metal vapor laser device pumping |
| CN112260056A (en) * | 2020-10-22 | 2021-01-22 | 中国科学院国家授时中心 | Fast frequency tuning external cavity semiconductor laser |
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| Publication number | Publication date |
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| CN1200497C (en) | 2005-05-04 |
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Assignee: Chongqing Yuejin science and Technology Development Co Ltd Assignor: Wuhan chemical giant Photon Technology Co., Ltd. Contract record no.: 2010500000047 Denomination of invention: DWDM laser with wavelength selective tuning Granted publication date: 20050504 License type: Exclusive License Open date: 20030115 Record date: 20100909 |
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