Mid-infrared optical frequency comb in the 2.7–4.0 μm range via difference frequency generation from a compact laser system

Lian Zhou; Yang Liu; Gehui Xie; Chenglin Gu; Zejiang Deng; Zhiwei Zhu; Cheng Ouyang; Zhong Zuo; Daping Luo; Bin Wu; Kunfeng Chen; Wenxue Li

doi:10.1017/hpl.2020.32

Journals >High Power Laser Science and Engineering >Volume 8 >Issue 4 >Page 04000e32 > Article

High Power Laser Science and Engineering
Vol. 8, Issue 4, 04000e32 (2020)

Mid-infrared optical frequency comb in the 2.7–4.0 μm range via difference frequency generation from a compact laser system

Lian Zhou¹, Yang Liu^1、*, Gehui Xie¹, Chenglin Gu¹, Zejiang Deng¹, Zhiwei Zhu¹, Cheng Ouyang¹, Zhong Zuo¹, Daping Luo¹, Bin Wu³, Kunfeng Chen³, and Wenxue Li^1、2、*

Author Affiliations

¹State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai200062, China

²Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan030006, China

³Science and Technology on Electronic Test & Measurement Laboratory, The 41st Research Institute of CETC, Qingdao266000, China

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DOI: 10.1017/hpl.2020.32 Cite this Article Set citation alerts

Lian Zhou, Yang Liu, Gehui Xie, Chenglin Gu, Zejiang Deng, Zhiwei Zhu, Cheng Ouyang, Zhong Zuo, Daping Luo, Bin Wu, Kunfeng Chen, Wenxue Li. Mid-infrared optical frequency comb in the 2.7–4.0 μm range via difference frequency generation from a compact laser system[J]. High Power Laser Science and Engineering, 2020, 8(4): 04000e32 Copy Citation Text

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Abstract

We report on the generation of a mid-infrared (mid-IR) frequency comb with a maximum average output power of 250 mW and tunability in the 2.7–4.0 μm region. The approach is based on a single-stage difference frequency generation (DFG) starting from a compact Yb-doped fiber laser system. The repetition rate of the near-infrared (NIR) comb is locked at 75 MHz. The phase noise of the repetition rate in the offset-free mid-IR comb system is measured and analyzed. Except for the intrinsic of NIR comb, environmental noise at low frequency and quantum noise at high frequency from the amplifier chain and nonlinear spectral broadening are the main noise sources of broadening the linewidth of comb teeth, which limits the precision of mid-IR dual-comb spectroscopy.

Keywords

fiber laser mid-infrared optical frequency comb