TY - JOUR
T1 - Femtosecond-laser pumped CdSiP2 optical parametric oscillator producing 100 MHz pulses centered at 6.2 μm
AU - Zhang, Zhaowei
AU - Reid, Derryck T.
AU - Kumar, S. Chaitanya
AU - Ebrahim-Zadeh, Majid
AU - Schunemann, Peter G
AU - Zawilski, Kevin T
AU - Howle, Christopher R
PY - 2013/12/1
Y1 - 2013/12/1
N2 - We report the first, to the best of our knowledge, femtosecond-laser-pumped optical parametric oscillator (OPO) based on the newly developed nonlinear crystal, CdSiP2. The OPO was synchronously pumped by a mode-locked Yb:KYW/Yb:fiber master-oscillator power amplifier, providing 1.053xA0;x3BC;m pump pulses with durations of 130xA0;fs at a repetition rate of 100xA0;MHz. The 0.5-mm-thick CdSiP2 crystal was cut for a type-I noncritical interaction, providing a broad phase-matching bandwidth and ensuring excellent temporal overlap among the pump, signal, and idler pulses. The OPO generated signal pulses with a spectral coverage over 1260x2013;1310xA0;nm and mid-infrared idler pulses with a broad spectral coverage at 5.8x2013;6.6xA0;x3BC;m (6.2xA0;THz). With a 2% output coupler (OC), the threshold pump power was 600xA0;mW. At the maximum pump power of 1.6xA0;W, 0.55xA0;W was absorbed due to two-photon absorption and residual linear absorption in the CdSiP2 crystal, 0.75xA0;W was transmitted, and 53xA0;mW signal power was extracted through the OC. We estimate that the generated idler power was 24xA0;mW.
AB - We report the first, to the best of our knowledge, femtosecond-laser-pumped optical parametric oscillator (OPO) based on the newly developed nonlinear crystal, CdSiP2. The OPO was synchronously pumped by a mode-locked Yb:KYW/Yb:fiber master-oscillator power amplifier, providing 1.053xA0;x3BC;m pump pulses with durations of 130xA0;fs at a repetition rate of 100xA0;MHz. The 0.5-mm-thick CdSiP2 crystal was cut for a type-I noncritical interaction, providing a broad phase-matching bandwidth and ensuring excellent temporal overlap among the pump, signal, and idler pulses. The OPO generated signal pulses with a spectral coverage over 1260x2013;1310xA0;nm and mid-infrared idler pulses with a broad spectral coverage at 5.8x2013;6.6xA0;x3BC;m (6.2xA0;THz). With a 2% output coupler (OC), the threshold pump power was 600xA0;mW. At the maximum pump power of 1.6xA0;W, 0.55xA0;W was absorbed due to two-photon absorption and residual linear absorption in the CdSiP2 crystal, 0.75xA0;W was transmitted, and 53xA0;mW signal power was extracted through the OC. We estimate that the generated idler power was 24xA0;mW.
KW - Ultrafast lasers
KW - Nonlinear optics, parametric processes
KW - Parametric oscillators and amplifiers
KW - Ultrafast nonlinear optics
U2 - 10.1364/OL.38.005110
DO - 10.1364/OL.38.005110
M3 - Article
C2 - 24281522
SN - 0146-9592
VL - 38
SP - 5110
EP - 5113
JO - Optics Letters
JF - Optics Letters
IS - 23
ER -