Theoretical simulation of compound ring cavity filter for single longitudinal mode fiber laser

Cheng Dan; Zhang Kun; Fang Yitao; Zhang Haobin; Cheng Zhaochen; Wu Tong; Yu Yang; Sun Rufeng; Li Yao; Song Kuiyan; Zhang Liming; Zhang Dayong; Zhao Hong; Feng Ting

doi:10.11884/HPLPB202335.230145

Volume 35 Issue 12

Nov. 2023

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Article Navigation > High Power Laser and Particle Beams > 2023 > 35(12): 121001

Cheng Dan, Zhang Kun, Fang Yitao, et al. Theoretical simulation of compound ring cavity filter for single longitudinal mode fiber laser[J]. High Power Laser and Particle Beams, 2023, 35: 121001. doi: 10.11884/HPLPB202335.230145

Citation:

Cheng Dan, Zhang Kun, Fang Yitao, et al. Theoretical simulation of compound ring cavity filter for single longitudinal mode fiber laser[J]. High Power Laser and Particle Beams, 2023, 35: 121001. doi: 10.11884/HPLPB202335.230145

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Theoretical simulation of compound ring cavity filter for single longitudinal mode fiber laser

doi: 10.11884/HPLPB202335.230145

1.
Science and Technology on Solid-State Laser Laboratory, No. 11th Research Institute of China Electronics Technology Group Corporation, Beijing 100016, China
2.
Photonics Information Innovation Center, College of Physics Science & Technology, HeBei University, Baoding 071002, China

Received Date: 2023-05-25
Accepted Date: 2023-10-23
Rev Recd Date: 2023-10-23

Available Online: 2023-10-27

Publish Date: 2023-12-15

Abstract

Abstract

A method for simulating the optical-coupler-based fiber compound ring cavity (CRC) filter for mode selection of the single longitudinal mode fiber laser is proposed. With this method, we theoretically simulated two types of novel dual-coupler double ring CRC (DCDR-CRC) filter and tri-coupler double ring CRC (TCDR-CRC) filter. By introducing the Vernier effect, the transmittance characteristics of the proposed two filters under different cavity length differences are analyzed. The effective free spectral range (FSR), suppression ratio (SR) and bandwidth of the main transmission peak of CRC filters are optimized by adjusting the coupling ratios, cavity length and cavity length difference of the DCDR-CRC and TCDR-CRC filters. The simulated results show that the optimized effective FSR of the ring cavity can effectively suppress the gain competition in the transmission passband of the wavelength selector. Furthermore the lower SR can suppress the gain competition between the adjacent transmission peaks of the CRC filter, and the narrower bandwidth of the main transmission peak can ensure that only one longitudinal mode of the laser can be selected.
- filter,
- single longitudinal mode,
- dual-coupler double ring,
- tri-coupler double ring,
- Vernier effect

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References(14)

References

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