Title :
High-gain array of semiconductor optical amplifier integrated with bent spot-size converter (BEND SS-SOA)
Author :
Suzaki, Yasumasa ; Magari, Katsuaki ; Kondo, Yasuhiro ; Kawaguchi, Yoshihiro ; Kadota, Yoshiaki ; Yoshino, Kaoru
Author_Institution :
NTT Photonics Labs., Kanagawa, Japan
fDate :
11/1/2001 12:00:00 AM
Abstract :
We propose a high-gain semiconductor optical amplifier with an integrated bent spot-size converter (BEND SS-SOA). A straight active waveguide enables us to use a pn-buried heterostructure (pn-BH) with a high current-blocking effect and uniform characteristics. We can optimize a bent spot-size converter waveguide to provide low optical feedback from the facets and high-coupling efficiency to a flat-end optical fiber with low radiation loss due to the bend. The devices we fabricated achieve a high fiber-to-fiber gain of 18 dB with a coupling efficiency of -3.5 dB, and we have demonstrated a four-channel array with uniform characteristics
Keywords :
laser feedback; optical losses; optical transmitters; semiconductor laser arrays; semiconductor optical amplifiers; waveguide lasers; wavelength division multiplexing; 18 dB; coupling efficiency; fiber-to-fiber gain; flat-end optical fiber; four-channel array; high-coupling efficiency; high-gain laser array; integrated bent spot-size converter; low optical feedback; low radiation loss; pn-buried heterostructure; semiconductor optical amplifier; straight active waveguide; uniform characteristics; Fiber nonlinear optics; Nonlinear optics; Optical arrays; Optical feedback; Optical films; Optical mixing; Optical waveguides; Semiconductor optical amplifiers; Stimulated emission; Wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
