MI microcombs with 2/3-octave spanning. (IMAGE)
Caption
(a) Broadband MI microcomb spectra. The corresponding pump power from the bottom (green) to the top (blue) of the spectra are 23.5 dBm, 24.5 dBm, 25 dBm, 25.5 dBm and 26 dBm. Four residual primary comb envelopes are marked by λ₁ - λ₄, and the mirror coating induced fixed peaks are marked by T₁-T₅. At the injected pump power of 26 dBm, the measured comb spectrum covers from 1240 nm to 1950 nm (more than 2/3 octave in −40 dB range) with 10-GHz comb line spacing and more than 8400 comb lines. (b) Measured transmission spectrum of dielectric mirror coating. (c) Repetition-rate beatnote signals of MI microcomb near 1300 nm (yellow), 1530 nm (blue), and 1580 nm (green). Their beatnote signals show an extinction ratio larger than 35 dB. (d) Transmission curve for pump power of 26 dBm, which indicates that this broadband MI microcomb state can also enter the mode-locked soliton state. The red dashed line marks the measured position of the MI microcomb spectrum as shown in blue curve in (a).
Credit
by Zeyu Xiao, Tieying Li, Minglu Cai, Hongyi Zhang, Yi Huang, Chao Li, Baicheng Yao, Kan Wu and Jianping Chen
Usage Restrictions
Credit must be given to the creator.
License
CC BY