Title :
Spot-size converted polarization-insensitive SOA gate with a vertical tapered submicrometer stripe structure
Author :
Yoshimoto, N. ; Magari, K. ; Ito, T. ; Kawaguchi, Y. ; Kishi, K. ; Kondo, Y. ; Kadota, Y. ; Mitomi, O. ; Yoshikuni, Y. ; Hasumi, Y. ; Tohmori, Y. ; Nakajima, O.
Author_Institution :
NTT Opto-Electron. Labs., Kanagawa, Japan
fDate :
4/1/1998 12:00:00 AM
Abstract :
To develop polarization-insensitive semiconductor optical amplifier (SOA) gates into more efficient and functional optical components by using hybrid integration with a planer lightwave circuit (PLC) platform, vertical tapered spot-size converters were integrated into a SOA gate with a narrow mesa-stripe structure of submicrometer width leading to low coupling loss (2.6 dB). Very-low polarization dependence of gain (<0.2 dB) and high extinction ratio (>30 dB) were achieved in a wide wavelength range (40 nm). High-speed (<1 us) gate operation was also demonstrated. These results indicate that the spot-size converted SOA integrated on a PLC platform will perform well in wavelength-division-multiplexing (WDM) applications.
Keywords :
integrated optoelectronics; light polarisation; optical communication equipment; semiconductor lasers; waveguide lasers; wavelength division multiplexing; 0.2 dB; 1 ns; SOA gate; WDM; functional optical components; gate operation; high extinction ratio; hybrid integration; low coupling loss; narrow mesa-stripe structure; planer lightwave circuit platform; spot-size converted SOA; spot-size converted polarization-insensitive SOA gate; submicrometer width; vertical tapered spot-size converters; vertical tapered submicrometer stripe structure; very-low polarization dependence; wavelength-division-multiplexing; wide wavelength range; Coupling circuits; Gain; Lead compounds; Metalworking machines; Optical coupling; Optical devices; Optical losses; Optical polarization; Programmable control; Semiconductor optical amplifiers;
Journal_Title :
Photonics Technology Letters, IEEE
