27 February 2014 Bragg-grating-stabilized external cavity lasers for gas sensing using tunable diode laser spectroscopy
Author Affiliations +
Conventional singlemode semiconductor DFB and VCSEL lasers used in high resolution spectroscopy are often required to operate at specific, custom wavelengths, such as those associated with gas absorption lines. We present the results of work to develop alternative sources in the 1550nm and 1650nm regions, the latter coinciding with an absorption line of methane. Custom wavelength Bragg gratings have been used to stabilize the output of external cavity lasers implemented in both optical fiber and planar silica-on-silicon integrated circuits, using commercially available semiconductor gain chips, to give laser output at 1648 and 1649 nm, respectively. Thermal expansion or mechanical strain of the Bragg grating offers a suitable wavelength tuning mechanism. Results are presented including the wavelength tuning range, output power, relative intensity noise (RIN), side-mode suppression and linewidth of devices for application in high resolution gas spectroscopy. The different methods of writing Bragg gratings in optical fiber and planar silica-on-silicon allow a high degree of flexibility in the choice of emission wavelength.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. G. Lynch, S. G. Lynch, F. Chen, F. Chen, J. C. Gates, J. C. Gates, C. Holmes, C. Holmes, S. E. Staines, S. E. Staines, S. W. James, S. W. James, J. Hodgkinson, J. Hodgkinson, P. G. R. Smith, P. G. R. Smith, R. P. Tatam, R. P. Tatam, "Bragg-grating-stabilized external cavity lasers for gas sensing using tunable diode laser spectroscopy", Proc. SPIE 9002, Novel In-Plane Semiconductor Lasers XIII, 900209 (27 February 2014); doi: 10.1117/12.2039971; https://doi.org/10.1117/12.2039971


Cryogenic-cooled Tm:SBN tunable laser
Proceedings of SPIE (November 30 2017)
A wavelength swept laser with the sweep rate of 150...
Proceedings of SPIE (May 15 2008)
Laser and optics in Uruguay
Proceedings of SPIE (July 05 1999)
Diode laser spectroscopy for on-line chemical analysis
Proceedings of SPIE (August 13 1992)

Back to Top