Title :
Compact Vertically Stacked Master Oscillator Power Amplifier Based on Grating Coupled Laser Diodes
Author :
Smolski, Oleg V. ; O´Daniel, Jason K. ; Johnson, Eric G.
Author_Institution :
Opt./CREOL, Central Florida Univ., Orlando, FL
Abstract :
A new design of hybrid master oscillator power amplifier (MOPA) has been proposed and realized by vertically stacking laser diodes with optical coupling provided by identical in-plane integrated gratings. Low beam divergence, large emitting and input areas of the grating coupled devices simplify the assembling technique over the fabrication of MOPA devices based on edge-emitting laser diodes. The master oscillator also incorporates a dual-grating reflector providing a wavelength-selective feedback resulting in a narrow emission spectrum of 0.2 nm at a wavelength of 975.4 nm. The power amplifier is a tapered chip with two integrated grating couplers. The operational characteristics of the MOPA were evaluated in the pulse regime demonstrating an output peak power of 32 W with a total amplification factor of 9.3dB
Keywords :
diffraction gratings; integrated optics; integrated optoelectronics; laser feedback; optical couplers; semiconductor lasers; 32 W; 975.4 nm; assembling technique; beam divergence; integrated gratings; laser diodes; master oscillator power amplifier; optical coupling; wavelength-selective feedback; Diode lasers; Gratings; Optical amplifiers; Optical coupling; Optical design; Oscillators; Power amplifiers; Pulse amplifiers; Semiconductor optical amplifiers; Stacking; Integrated optoelectronics; optical coupling; semiconductor lasers; semiconductor optical amplifiers (SOAs);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.881679
