Tunable Fiber Laser Based on Cascaded Grating Combing with Sagnac Loop

ZHAO Xiao-li; ZHANG Yu-min; ZHUANG Wei; SONG Yan-ming; LUO Fei; MENG Fan-yong

doi:10.3788/fgxb20194003.0357

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Tunable Fiber Laser Based on Cascaded Grating Combing with Sagnac Loop

Device Fabrication and Physics | 更新时间：2020-08-12

- Tunable Fiber Laser Based on Cascaded Grating Combing with Sagnac Loop
- Chinese Journal of Luminescence Vol. 40, Issue 3, Pages: 357-365(2019)
- 作者机构：
  
  1. 北京信息科技大学光电信息与仪器北京市工程研究中心北京,100016
  2. 合肥工业大学仪器科学与光电工程学院,安徽合肥,230009
  3. 现代测控技术教育部重点实验室北京,100192
  4. 北京信息科技大学光电测试技术北京市重点实验室北京,100192
- 作者简介：
- 基金信息：
  
  Supported by Project of "Changjiang Scholar and Innovation Team Development Plan"of Ministry of Education(IRT_16R07);Beijing Municipal High School Talent Introduction and Training Program(IDHT20170510)
- DOI：10.3788/fgxb20194003.0357
  CLC： TN243
- Received：21 May 2018，
  
  Revised：07 September 2018，
  
  Published Online：17 September 2018，
  
  Published：05 March 2019
- 稿件说明：
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赵小丽, 张钰民, 庄炜等. 级联光栅结合Sagnac环的可调谐光纤激光器[J]. 发光学报, 2019,40(3): 357-365

ZHAO Xiao-li, ZHANG Yu-min, ZHUANG Wei etc. Tunable Fiber Laser Based on Cascaded Grating Combing with Sagnac Loop[J]. Chinese Journal of Luminescence, 2019,40(3): 357-365
赵小丽, 张钰民, 庄炜等. 级联光栅结合Sagnac环的可调谐光纤激光器[J]. 发光学报, 2019,40(3): 357-365 DOI： 10.3788/fgxb20194003.0357.

ZHAO Xiao-li, ZHANG Yu-min, ZHUANG Wei etc. Tunable Fiber Laser Based on Cascaded Grating Combing with Sagnac Loop[J]. Chinese Journal of Luminescence, 2019,40(3): 357-365 DOI： 10.3788/fgxb20194003.0357.

摘要

提出并验证了一种单-双波长可调谐掺铒光纤激光器。利用级联光纤布拉格光栅（Cascaded Fiber Bragg gratings，Cascaded FBGs）结合Sagnac环结构所产生的复合滤波效应，实现较高精细度滤波，并通过调节环内偏振控制器（Polarization Controller，PC），引入双折射效应，得到波长可调谐的光纤激光器。基于耦合模理论并使用传输矩阵法对该结构的传输特性进行了分析，在此基础上搭建实验系统，验证了理论分析的正确性。实验结果表明:通过调节PC，激光器输出激光的波长范围约为1 555.644~1 556.112 nm，双波长间隔的可调范围约为0.108~0.452 nm，单-双波长的边模抑制比（SMSR）均高于40 dB；在稳定性测试中，输出单-双波长激光的波长最大漂移量小于0.008 nm。该方法具有结构简单、调谐方便、易于实现且精细度较高的优点，可应用于密集波分复用及全光通信系统等领域。

Abstract

A tunable single-dual wavelength erbium-doped fiber laser is proposed and demonstrated. The finer filtering is generated by compound filtering effect which is produced by cascaded fiber Bragg gratings(Cascaded FBGs) combined with Sagnac loop

the birefringence effect is introduced by adjusting polarization controller(PC) in Sagnac loop

and then the tunable fiber laser is obtained. Based on the coupled mode theory and transmission matrix

the characteristics of the structure are analyzed

experimental system is established

and the correctness of theoretical analysis is verified. The experimental results show that

by adjusting PC

the adjustable laser range is about 1 555.644~1 556.112 nm

the wavelength spacing of dual-wavelength is about 0.108~0.452 nm

the side mode suppression ratio (SMSR) of single-and dual-wavelength is more than 40 dB. In the stability test

the maximum wavelength drift of single-and dual-wavelength fiber laser is less than 0.008 nm. The proposed method has the advantages of simple structure

convenient tuning

easy implementation and high fineness

which can be applied in fields such as dense wavelength division multiplexing(DWDM) and all-optical communication systems.

关键词

Keywords

references

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