Infrared tunable diode laser control: frequency stabilization and digitization of spectra leading to high sensitivity and accurate frequency scale

Journal Article · Tue Oct 31 23:00:00 EST 1989 · Applied Optics; (USA)

DOI:https://doi.org/10.1364/AO.28.004525· OSTI ID:5364069

Nicolas, C; Mantz, A W ^[1]

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1. Laser Analytics, Inc., 25 Wiggins Avenue, Bedford, Massachusetts 01730-2392 (US)

An infrared diode laser is frequency stabilized to a tunable internally coupled Fabry-Perot interferometer (icFPI). Diode laser spectra are digitally recorded utilizing a step-by-step tuning and stabilization sequence of the icFPI. Fringes from a frequency stabilized reference He--Ne laser are used to control digital sampling steps. While improving significantly the spectral SNR, this method is combined with a confocal Fabry-Perot etalon, thus providing a frequency scale accuracy of {similar to}3.5 {times} 10{sup {minus}5} cm{sup {minus}1} over a 1-cm{sup {minus}1} scan. The method is shown to be consistent with high resolution Fourier transform and heterodyne spectroscopy results.

• OSTI ID: 5364069
• Journal Information: Applied Optics; (USA), Journal Name: Applied Optics; (USA) Vol. 28:21; ISSN 0003-6935; ISSN APOPA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
CONTROL
ELECTROMAGNETIC RADIATION
FREQUENCY CONTROL
INFRARED RADIATION
INFRARED SPECTRA
LASERS
LIGHT SOURCES
RADIATION SOURCES
RADIATIONS
RESOLUTION
SEMICONDUCTOR DEVICES
SEMICONDUCTOR LASERS
SENSITIVITY
SOLID STATE LASERS
SPECTRA
STABILIZATION
TUNING