Compact and low power-consumption MIR DFB-QCL with To-CAN package for portable sensor

Makoto Murata; Hiroyuki Yoshinaga; Masaki Migita; Hiroki Mori; Yukihiro Tsuji; Takashi Kato; Jun-ichi Hashimoto; Mitsuru Ekawa; Yasuhiro Iguchi; Tsukuru Katsuyama

doi:10.1117/12.2287696

26 January 2018 Compact and low power-consumption MIR DFB-QCL with To-CAN package for portable sensor

Makoto Murata, Hiroyuki Yoshinaga, Masaki Migita, Hiroki Mori, Yukihiro Tsuji, Takashi Kato, Jun-ichi Hashimoto, Mitsuru Ekawa, Yasuhiro Iguchi, Tsukuru Katsuyama

Author Affiliations +

Proceedings Volume 10540, Quantum Sensing and Nano Electronics and Photonics XV; 105401O (2018) https://doi.org/10.1117/12.2287696
Event: SPIE OPTO, 2018, San Francisco, California, United States

Abstract

Sensing method with Quantum Cascade Laser (QCL) as a light source is expected to offer a high sensitivity, a short measurement time, and a good portability compared to conventional methods. However, commercially available QCLs have high power-consumption of several W. Therefore, a large power supply is required to drive QCL, and most of the input power is released as heat, leading to the necessity for a large cooling system. For these reasons, portable gas sensors using QCL have not been realized. To address this issue, we had recently developed a low power-consumption DFB-QCL in the 7μm wavelength region. In this study, we developed a compact and low power consumption QCL module with Φ 15.4 mm To-CAN package. The QCL device, a thermoelectric cooler (TEC), a thermistor and a window were assembled in this package. The threshold power-consumption and the maximum output power were 0.97 W and 37 mW at 20°C, respectively under continuous wave driving. In addition, it maintained a single mode operation between 20°C and 80°C without a mode hopping. The performance of this QCL module as a light source for gas sensing was evaluated by measuring the mid-infrared absorption spectrum of the methane gas with a multi pass type gas cell. High sensitive methane gas detection was achieved, which was comparable to that of the conventional high heat load (HHL) packaged QCL module reported by other group. It is expected that a compact and low-cost MIR gas sensor with high-sensitivity can be realized with our QCL module.

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Makoto Murata, Hiroyuki Yoshinaga, Masaki Migita, Hiroki Mori, Yukihiro Tsuji, Takashi Kato, Jun-ichi Hashimoto, Mitsuru Ekawa, Yasuhiro Iguchi, and Tsukuru Katsuyama "Compact and low power-consumption MIR DFB-QCL with To-CAN package for portable sensor", Proc. SPIE 10540, Quantum Sensing and Nano Electronics and Photonics XV, 105401O (26 January 2018); https://doi.org/10.1117/12.2287696

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KEYWORDS

Quantum cascade lasers

Absorption

Sensors

Mid-IR

Molecules

Light sources

Gas sensors

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