Sub-ppb-level CH4 detection by exploiting a low-noise differential photoacoustic resonator with a room-temperature interband cascade laser | Zendy

Huadan Zheng | Zendy; Yihua Liu | Zendy; Haoyang Lin | Zendy; Ruifeng Kan | Zendy; Pietro Patimisco | Zendy; Angelo Sampaolo | Zendy; Marilena Giglio | Zendy; Wenguo Zhu | Zendy; Jianhui Yu | Zendy; Frank K. Tittel | Zendy; Vincenzo Spagnolo | Zendy; Zhe Chen | Zendy

Open Access

Sub-ppb-level CH₄ detection by exploiting a low-noise differential photoacoustic resonator with a room-temperature interband cascade laser

Author(s) -

Huadan Zheng,

Yihua Liu,

Haoyang Lin,

Ruifeng Kan,

Pietro Patimisco,

Angelo Sampaolo,

Marilena Giglio,

Wenguo Zhu,

Jianhui Yu,

Frank K. Tittel,

Vincenzo Spagnolo,

Zhe Chen

Publication year - 2020

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.391322

Subject(s) - optics , laser , resonator , materials science , wavelength , noise (video) , time delay and integration , cascade , relative intensity noise , optoelectronics , modulation (music) , detection limit , physics , semiconductor laser theory , chemistry , acoustics , chromatography , artificial intelligence , computer science , image (mathematics)

An ultra-highly sensitive and robust CH 4 sensor is reported based on a 3.3 µm interband cascade laser (ICL) and a low-noise differential photoacoustic (PAS) cell. The ICL emission wavelength targeted a fundamental absorption line of CH 4 at 2988.795 cm -1 with an intensity of 1.08 × 10 -19 cm/molecule. The double-pass and differential design of the PAS cell effectively enhanced the PAS signal amplitude and decreased its background noise. The wavelength modulation depth, operating pressure and V-T relaxation promotion were optimized to maximize the sensor detection limit. With an integration time of 90 s, a detection limit of 0.6 ppb was achieved. No additional water or air laser cooling were required and thereby allowing the realization of a compact and robust CH 4 sensor.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research