Abstract

We demonstrate the generation of optical frequency combs with tunable spacing at the hundred-GHz range in the 1550-nm window. The widely spaced combs are realized through silicon-based cross-phase modulation. The optical pump is prepared by multiplication of a 10-GHz train of 1.7-ps pedestal-free pulses. Energy-efficient temporal Talbot processing is used to multiply the repetition rate by a factor of up to 20. In our approach, the multiplication factor can be flexibly controlled by tuning the temporal dispersion inside an optical processor. Optical frequency combs with spacings ranging from 140 to 200 GHz have been successfully generated with a maximum carrier-to-noise suppression ratio of ∼45 dB.

© 2022 Optica Publishing Group

Generation of GHz line-spacing tunable optical frequency combs using Talbot effects

Juanjuan Yan, Yu Wang, and Hanlei Zeng
Appl. Opt. 62(25) 6835-6840 (2023)

Tunable acousto-optic optical frequency combs

Andrey Voloshin and Sergey Mantsevich
Opt. Lett. 47(17) 4540-4543 (2022)

Frequency comb with 100 GHz spacing generated by an asymmetric MQW passively mode-locked laser

Lianping Hou, Yongguang Huang, Yihui Liu, Ruikang Zhang, Jiankun Wang, Baojun Wang, Hongliang Zhu, Bin Hou, Bocang Qiu, and John H. Marsh
Opt. Lett. 45(10) 2760-2763 (2020)

Optical comb for generation of a continuously tunable coherent THz signal from 122.5  GHz to >2.7 THz

Lalitha Ponnampalam, Martyn Fice, Haymen Shams, Cyril Renaud, and Alwyn Seeds
Opt. Lett. 43(11) 2507-2510 (2018)

Multiple-frequency-spaced flat optical comb generation using a multiple-parallel phase modulator

Takahide Sakamoto and Akito Chiba
Opt. Lett. 42(21) 4462-4465 (2017)