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Laser with tunable outer cavity and method for using same

A technology for tuning lasers and lasers, applied in the optical field, can solve problems such as low tuning speed, complex control system, and difficult control, and achieve the effect of quick and easy wavelength tuning and selection process

Active Publication Date: 2012-12-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to accurately implement single longitudinal mode lasing, it is necessary to "simultaneously and accurately control" the transmission spectrum distribution of two wavelength selective elements, making the control extremely difficult, so the control system is complex and the tuning rate is low

Method used

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  • Laser with tunable outer cavity and method for using same
  • Laser with tunable outer cavity and method for using same
  • Laser with tunable outer cavity and method for using same

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0035] Embodiment one, as Figure 4 As shown, the above-mentioned optical path difference generation optical path 400 includes: at least two mirrors 401 ( Figure 4 Two reflectors shown: reflector 401A and reflector 401B), and at least one reflector 401 can be adjusted in position; the position of reflector 401A can be adjusted, and the position of reflector 401B can also be adjusted. The positions of the mirror 401A and the mirror 401B are both adjustable.

[0036] Each reflector 401 is located in the propagation direction of the branch light beam generated by the above-mentioned incident optical path difference generating optical path 400 and the reflection surface of each reflector 401 is perpendicular to the propagation direction of the above-mentioned branch light beam;

[0037] The above-mentioned optical path difference generation optical path 400 can adjust the optical path difference between the optical paths of the light beams of each branch, specifically: adjust th...

Embodiment 2

[0044] Embodiment two, such as Figure 9 As shown, the above-mentioned optical path difference generation optical path 400 includes: a beam splitter 402; at least two mirrors 403 ( Figure 9 Two reflectors shown: reflector 403A and reflector 403B), and at least one reflector 403 can be adjusted in position; specifically, the position of reflector 403A can be adjusted, and the position of reflector 403B can also be adjusted. The positions of the mirror 403A and the mirror 403B are both adjustable.

[0045] The beam splitter 402 is located in the optical path of the parallel beam incident to the optical path difference generating optical path 400, and is used to split the parallel beam incident into the beam splitter 402 into at least two branch beams;

[0046] The number of the above-mentioned reflectors 403 is the same as the number of the above-mentioned branch beams, one reflector 403 is located in the optical path of a branch beam, and the reflection surface of each reflec...

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Abstract

Provided in embodiments of the present invention are a laser with tunable outer cavity and a method for using the same, wherein the laser with tunable outer cavity comprises a gain chip, a collimating mirror, a wavelength selecting element, and an optical path difference generating optical passageway; a cavity surface of the gain chip is located in a focal plane of the collimating mirror; the wavelength selecting element is located between the collimating mirror and the optical path difference generating optical passageway; light beams emitted from the cavity surface of the gain chip are collimated by the collimating mirror to form parallel beams which are sent to the wavelength selecting element; the wavelength selecting element filters the parallel beams from the collimating mirror and then sends them to the optical path difference generating optical passageway; the optical path difference generating optical passageway splits the parallel beams entering the optical path difference generating optical passageway into at least two branch beams, and reflects each of the branch beams in the incident direction to the gain chip, wherein the optical path difference generating optical passageway is capable of adjusting the optical path difference between the optical paths of the branch beams. Since the optical path difference generating passageway serves to roughly select mode without the need for precious control and adjustment, the process of wavelength tuning and selecting is made easier.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to an external cavity tunable laser and a use method thereof. Background technique [0002] Large-capacity high-speed optical transmission and more flexible optical network structure are the development trend of optical communication. In order to achieve a single-wave transmission rate greater than 40Gbps, high-order modulation and coherent receiving technology are generally used, and the optical carrier linewidth is required to be less than 100KHz in order to suppress phase noise and realize signal phase detection. On the other hand, the intelligent and flexible optical network has the characteristics of dynamic wavelength allocation, which can be realized by adjusting the wavelength or frequency of the optical carrier. Therefore, narrow linewidth tunable lasers are of great significance to the evolution of optical communication systems. [0003] At present, the realization of n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/14
CPCH01S5/141
Inventor 陈波高磊张光勇陈熙
Owner HUAWEI TECH CO LTD