GaInAsSb/AlGaAsSb: single-mode DFB lasers for gas sensing in the 2-um wavelength range

Thomas Bleuel; M. Brockhaus; J. Koeth; J. Hofmann; Ralph Werner; Alfred W. B. Forchel

doi:10.1117/12.372907

15 December 1999 GaInAsSb/AlGaAsSb: single-mode DFB lasers for gas sensing in the 2-μm wavelength range

Thomas Bleuel, M. Brockhaus, J. Koeth, J. Hofmann, Ralph Werner, Alfred W. B. Forchel

Proceedings Volume 3858, Advanced Materials and Optical Systems for Chemical and Biological Detection; (1999) https://doi.org/10.1117/12.372907
Event: Photonics East '99, 1999, Boston, MA, United States

Abstract

Diode lasers emitting in the wavelength range between 1.7 and 4 micrometers are of particular interest for a large number of applications such as remote gas sensing, molecular spectroscopy and medical applications. Distributed feedback lasers show a singlemode emission and are therefore ideally suited for sensing applications. However the fabrication of DFB lasers usually comprises an overgrowth step of etched gratings, which critically determines the laser properties. We have developed high quality GaInAsSb/AlGaAsSb laser layers and have realized DFB lasers from them without the need to develop overgrowth processes. The laser structures were grown by solid source molecular beam epitaxy on n-GaSb substrates. Depending on the In and the As incorporation in the quantum well the emission wavelength can be varied from 1.5 up to 2.1 micrometers . Near 2 micrometers excellent room temperature performance has been obtained for strained Fabry Perot quantum-well lasers. Ridge waveguide lasers were realized by photolithography and reactive-ion etching. Using e-beam lithography and a Cr-metal lift off, DFB gratings were deposited on each side of the ridge. By using an appropriate grating period an emission wavelength around 2 micrometers was realized. The lasers have clean single mode spectra, threshold currents of less than 40 mA and deliver output powers in excess of 5 mW per facet.

Citation Download Citation

Thomas Bleuel, M. Brockhaus, J. Koeth, J. Hofmann, Ralph Werner, and Alfred W. B. Forchel "GaInAsSb/AlGaAsSb: single-mode DFB lasers for gas sensing in the 2-μm wavelength range", Proc. SPIE 3858, Advanced Materials and Optical Systems for Chemical and Biological Detection, (15 December 1999); https://doi.org/10.1117/12.372907

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available