Title :
1-W single-mode edge-emitting DBR ring oscillators
Author :
Dzurko, K.M. ; Welch, D.F. ; Scifres, D.R. ; Hardy, A.
Author_Institution :
Spectra Diode Labs., San Jose, CA, USA
fDate :
4/1/1993 12:00:00 AM
Abstract :
The distributed Bragg reflector (DBR) ring oscillator, a class of single-mode diode laser that emits high-power, spatially coherent, single-frequency output from a large aperture, is discussed. Specifically an edge-emitting DBR ring oscillator that exhibits single frequency operation to 1 W output from a single facet is discussed. From a second device, the far field radiation pattern is a 0.20 degrees diffraction-limited beam which remains stable and stationary up to 460 mW, measured from an uncoated facet. This device produces over 2.5 W of coherent power into four equal beams and has a threshold current density of 177 A/cm/sup 2/ and a differential quantum efficiency of 63%.<>
Keywords :
distributed Bragg reflector lasers; laser frequency stability; laser modes; ring lasers; semiconductor lasers; 1 W; 2.5 W; 460 mW; 63 percent; DBR ring oscillators; InGaAs-GaAs; coherent power; differential quantum efficiency; diffraction-limited beam; diode laser; distributed Bragg reflector; edge-emitting; equal beams; far field radiation pattern; high-power; large aperture; semiconductors; single facet; single-frequency output; single-mode; spatially coherent; threshold current density; uncoated facet; Apertures; Diffraction; Distributed Bragg reflectors; Frequency; Gratings; Laser beams; Optical amplifiers; Power generation; Pulse amplifiers; Ring oscillators;
Journal_Title :
Photonics Technology Letters, IEEE
