Use this resource - and many more! - in your textbook!
AcademicPub holds over eight million pieces of educational content for you to mix-and-match your way.

Beam quality issues for mid-infrared angled-grating distributed feedback lasers
By: Felix, C.L.; Bewley, W.W.; Jurkovic, M.J.; Bartolo, R.E.; Vurgaftman, I.; Meyer, J.R.; Manfra, M.J.; Turner, G.W.; Martinelli, R.U.; Lee, H.;
2001 / IEEE / 1-55752-662-1
Description
This item was taken from the IEEE Conference ' Beam quality issues for mid-infrared angled-grating distributed feedback lasers ' Summary form only given. Considerable effort has been expended to develop semiconductor lasers that simultaneously exhibit both high output power and good beam quality. A promising approach is the angled-grating distributed-feedback laser (/spl alpha/-DFB), in which a diffraction grating is etched into the laser cavity at an angle /spl theta/ with respect to the facets. We illustrate the /spl alpha/-DFB geometry alongside a simple broad-area Fabry-Perot laser configuration. Both the cavity facets and the grating are necessary to produce angular-selective optical feedback in the /spl alpha/-DFB laser. We recently reported the first /spl alpha/-DFB lasers emitting in the mid-IR. We discuss optically-pumped mid-IR (/spl lambda/=3.4, 4.6 /spl mu/m) /spl alpha/-DFB (/spl theta/= 16/spl deg/) lasers with antimonide type-II ""W"" active regions, which display near-diffraction-limited far-field characteristics for stripes as wide as 50 /spl mu/m.
Related Topics
Semiconductor Lasers
Output Power
Beam Quality
/spl Alpha/-dfb
Diffraction Grating
Laser Cavity
Simple Broad-area Fabry-perot Laser Configuration
Cavity Facets
Grating
Angular-selective Optical Feedback
Mid-ir Region
Optically-pumped Mid-ir Lasers
Type-ii ""w"" Active Regions
Near-diffraction-limited Far-field Characteristics
3.4 Micron
4.6 Micron
Laser Feedback
Semiconductor Lasers
Distributed Feedback Devices
Laser Beams
Optical Feedback
Power Lasers
Power Generation
Optical Diffraction
Diffraction Gratings
Etching
Mid-infrared Angled-grating Distributed Feedback Lasers
Beam Quality Issues
50 Micron
Laser Cavity Resonators
Diffraction Gratings
Laser Beams
Laser Feedback
Distributed Feedback Lasers
Semiconductor Lasers
Fabry-perot Resonators
Engineering
Angled-grating Distributed-feedback Laser