Title :
Monolithic integrated coherent receiver on InP substrate
Author :
Takeuchi, H. ; Kasaya, K. ; Kondo, Y. ; Yasaka, H. ; Oe, K. ; Imamura, Y.
Author_Institution :
NTT Opto-Electron. Lab., Kanagawa, Japan
Abstract :
The fabrication of a monolithic integrated coherent receiver with a wavelength-tunable DFB laser as local oscillator, a 3-dB waveguide directional coupler for mixing, and p-i-n photodiodes for detection is discussed. Optical heterodyne detection with a clear beat signal was experimentally observed using this monolithic integrated coherent receiver. Since an n-type substrate was used in this device, the two p-i-n photodiodes were not implemented in a balanced mixer configuration. Balanced mixing might be possible if the same structure were fabricated on a semi-insulating substrate. The results obtained suggest the possibility of applying this type of monolithic integrated coherent receiver to optical communication systems.<>
Keywords :
directional couplers; distributed feedback lasers; indium compounds; infrared detectors; integrated optoelectronics; optical communication equipment; optical couplers; p-i-n diodes; photodiodes; receivers; semiconductor junction lasers; III-V semiconductor; InP; InP substrate; balanced mixer configuration; clear beat signal; local oscillator; mixing; monolithic integrated coherent receiver; n-type substrate; optical communication systems; optical heterodyne detection; p-i-n photodiodes; waveguide directional coupler; wavelength-tunable DFB laser; Directional couplers; Indium phosphide; Integrated optics; Local oscillators; Optical device fabrication; Optical mixing; Optical receivers; Optical waveguides; PIN photodiodes; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
