Petrov K P, Ryan A T, Patterson T L, Huang L, Field S J, Bamford D J
Gemfire Corporation, Suite 600, 2471 East Bayshore Road, Palo Alto, California 94303, USA.
Opt Lett. 1998 Jul 1;23(13):1052-4. doi: 10.1364/ol.23.001052.
We report spectroscopic gas detection by the use of mid-infrared difference-frequency mixing of two diode lasers in a channel waveguide. The waveguide was fabricated by annealed proton exchange in periodically poled lithium niobate. We generated 3.43-3.73-microm tunable radiation in a single waveguide at room temperature by mixing diode lasers near 780 and 1010 nm. High-resolution spectra of methane were obtained in 2 s with electronically controlled frequency scans of 45 GHz. The use of highly efficient waveguide frequency converters pumped by fiber-coupled diode lasers will permit construction of compact, solid-state, room-temperature mid-infrared sources for use in trace-gas detection.
我们报告了通过在通道波导中利用两个二极管激光器的中红外差频混合进行光谱气体检测。该波导是通过在周期性极化铌酸锂中进行退火质子交换制成的。我们在室温下通过混合780纳米和1010纳米附近的二极管激光器，在单个波导中产生了3.43 - 3.73微米的可调谐辐射。通过45吉赫兹的电子控制频率扫描，在2秒内获得了甲烷的高分辨率光谱。使用由光纤耦合二极管激光器泵浦的高效波导频率转换器，将能够构建用于痕量气体检测的紧凑、固态、室温中红外光源。
