Journal
OPTICAL ENGINEERING
Volume 61, Issue 7, Pages -Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.OE.61.7.076102
Keywords
cavity compensation technique; tunable; long-wave infrared; optical parametric oscillator
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Funding
- Scientific Instrument Developing Project of the Chinese Academy of Sciences [YJKYYQ20210045]
- National Sciences Foundation of China [61775212, 61875198]
- Youth Innovation Promotion Association of CAS [2018158]
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This paper presents a cavity compensation technique for a tunable long-wave infrared ZGP OPO. The technique significantly improves the slope efficiency and achieves higher output power and narrower spectral bandwidth.
We present a cavity compensation technique based on a tunable long-wave infrared zinc germanium phosphide ZnGeP2 (ZGP) optical parametric oscillator (OPO). The slope efficiency increased from 3.6% to 7.0% at 9.15 mu m after using the cavity compensation technique in the tuning range of 8.02 to 9.15 mu m. We used a Q-switched 2.1 mu m Ho:YAG laser pump source with a pulse repetition frequency of 10 kHz. Under the incident pump power of 23.03 W, the maximum average idler output power of 2.16 W at 8.02 mu m was achieved with a pulse width of 21.5 ns and spectral bandwidth of 29.5 nm; the slope efficiency was 16.5%. To the best of our knowledge, this is the first application of the cavity compensation technique in tunable long-wave infrared ZGP OPO. (c) 2022 Society of Photo-Optical Instrumentation Engineers (SPIE)
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