High power optical frequency comb with 10-19 frequency instability
Posted on 2023-09-18 - 18:37
Optical frequency combs with more than 10 W have paved the way for extreme ultraviolet combs generation by interaction with inert gases, leading to extreme nonlinear spectroscopy and the ultraviolet nuclear clock. Recently, the demand for an ultra-long-distance time and frequency space transfer via optical dual-comb proposes a new challenge for high power frequency comb in respect of power scaling and optical frequency stability. Here we present a frequency comb based on fiber chirped pulse amplification (CPA), which can offer more than 20 W output power. We further characterize the amplifier branch noise contribution by comparing two methods of locking to an optical reference and measure the out-of-loop frequency instability by heterodyning two identical high-power combs. Thanks to the low noise CPA, reasonable locking method, and optical path-controlled amplifiers, the out-of-loop beat note between two combs demonstrates the unprecedented frequency stability of 4.35×10-17 at 1s and 6.54×10-19 at 1000 s.
CITE THIS COLLECTION
Shao, Xiaodong; Han, Hainian; Wang, Huibo; Ma, Junyi; Hu, Yue; Li, Chengzhi; et al. (2023). High power optical frequency comb with 10-19 frequency instability. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.6792285.v2
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AUTHORS (10)
XS
Xiaodong Shao
HH
Hainian Han
HW
Huibo Wang
JM
Junyi Ma
YH
Yue Hu
CL
Chengzhi Li
HT
Hao Teng
GC
Guoqing Chang
BW
Bingbing Wang
ZW
Zhiyi Wei