TY - JOUR
T1 - Mid-infrared octave-spanning supercontinuum and frequency comb generation in a suspended germanium-membrane ridge waveguide
AU - Yuan, Jinhui
AU - Kang, Zhe
AU - Li, Feng
AU - Zhang, Xianting
AU - Sang, Xinzhu
AU - Wu, Qiang
AU - Yan, Binbin
AU - Wang, Kuiru
AU - Zhou, Xian
AU - Zhong, Kangping
AU - Zhou, Guiyao
AU - Yu, Chongxiu
AU - Lu, Chao
AU - Tam, Hwa Yaw
AU - Wai, Ping-kong Alexander
PY - 2017/7/15
Y1 - 2017/7/15
N2 - Stable octave-spanning supercontinuum (SC) in the mid-infrared (MIR) region finds extensive applications in spectroscopy, metrology, biochemistry, etc. The absorption of conventional silicon- or silicon oxide-dominated nonlinear media makes SC generation in MIR region technically challenging. In this paper, we propose ultra-broadband MIR-SC generation using a suspended germanium-membrane ridge waveguide. We theoretically showed that when pump pulses centered at 4.8 um with pulse width at 180 fs and peak power at 800 W are injected into a 4-mm long proposed ridge waveguide, the SC generated ranges from 1.96 ~ 12 um (about 2.6 octaves), extending deep into the “fingerprint” region. The first-order coherence is calculated to confirm the stability of the generated SC. The performance of the SC-based frequency comb is also investigated by assuming a 100-pulses pump source at a repetition rate of 100 KHz.
AB - Stable octave-spanning supercontinuum (SC) in the mid-infrared (MIR) region finds extensive applications in spectroscopy, metrology, biochemistry, etc. The absorption of conventional silicon- or silicon oxide-dominated nonlinear media makes SC generation in MIR region technically challenging. In this paper, we propose ultra-broadband MIR-SC generation using a suspended germanium-membrane ridge waveguide. We theoretically showed that when pump pulses centered at 4.8 um with pulse width at 180 fs and peak power at 800 W are injected into a 4-mm long proposed ridge waveguide, the SC generated ranges from 1.96 ~ 12 um (about 2.6 octaves), extending deep into the “fingerprint” region. The first-order coherence is calculated to confirm the stability of the generated SC. The performance of the SC-based frequency comb is also investigated by assuming a 100-pulses pump source at a repetition rate of 100 KHz.
KW - Supercontinuum generation
KW - frequency comb generation
KW - Ge waveguide
KW - mid-infrared region
UR - https://www.scopus.com/pages/publications/85028432761
U2 - 10.1109/JLT.2017.2703644
DO - 10.1109/JLT.2017.2703644
M3 - Article
SN - 0733-8724
VL - 35
SP - 2994
EP - 3002
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 14
ER -