Tunable Infrared Semiconductor Lasers
Abstract
An 80 nm continuous tuning range has been demonstrated on a large area index-coupled, optically pumped mid-infrared type-II semiconductor distributed feedback (DFB) laser, with a typical spectral linewidth of ~1.2 nm and 820 mW single facet output power. Different from other methods to widely tune the laser output wavelength, such as a superstructure grating, thermal tuning, or external cavity grating or vernier effects. Our tuning mechanism is to shift the pump stripe to different positions of an addressable chirped, location-dependent period grating to select the different lasing wavelengths. Interferometric lithography (IL) technique is used to pattern this chirped grating with two coherent spherical waves. A new grating fabrication optical arrangement that reduces the longitudinal chirp is discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 20, 2013
- Accession Number
- ADA592169
Entities
People
- Steven R. Brueck
Organizations
- University of New Mexico