Tuning and stability of a continuous-wave mid-infrared high-power single resonant optical parametric oscillator
Tuning and stability of a continuous-wave mid-infrared high-power single resonant optical parametric oscillator
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DOI：
10.1007/s00340-002-0989-2
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发表时间：
2002-09
期刊：
影响因子：
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通讯作者：
M.M.A. van Herpen;Shaocheng Li;S. Bisson;S. T. L. Hekkert;Frans J. M. Harren
中科院分区：
文献类型：
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作者：
M.M.A. van Herpen;Shaocheng Li;S. Bisson;S. T. L. Hekkert;Frans J. M. Harren
在3.0 ~ 3.8 μm波长范围内，研制了一种连续波长为2.2 w、连续可调谐的单频OPO，用于分子微量气体的检测。通过优化泵浦束腰和腔长，提高了单谐振OPO的振荡阈值、输出功率和稳定性。对空气间隔和实体标准子进行了频率稳定和调谐测试，其中实体标准子的性能更好。温度振荡在PPLN晶体中引起小于200 MHz的空闲波长振荡，振荡时间超过300 s；短期稳定性小于3mhz / 1s。高激光功率与光声光谱相结合，实现了氮中乙烷的检测极限为万亿分之10。
A 2.2-W continuous-wave, continuously tunable, single-frequency OPO has been developed in the 3.0–3.8 μm wavelength range for the detection of molecular trace gasses. The oscillation threshold, output power and stability of the single resonant OPO were improved by optimizing pump beam waist and OPO cavity length. Both air-spaced and solid etalons were tested to frequency stabilize and tune the OPO, from which the solid etalon gave a better performance. Temperature oscillations in the PPLN crystal caused oscillations in the idler wavelength of less than 200 MHz over 300 s; the short-term stability was less than 3 MHz over 1 s. The high laser power, in combination with photoacoustic spectroscopy, achieved a detection limit of 10 parts-per-trillion for ethane in nitrogen.