Title :
A wavelength-tunable duplex integrated light source for fast wavelength switching
Author :
Okamoto, Hiroshi ; Yasaka, Hiroshi ; Sato, Kenji ; Yoshikuni, Yuzo ; Oe, Kunishige ; Kishi, Kenji ; Kondo, Yasuhiro ; Yamamoto, Mitsuo
Author_Institution :
NTT Opto-Electron. Labs., Kanagawa, Japan
fDate :
6/1/1996 12:00:00 AM
Abstract :
A new monolithically integrated opto-electronic device has been developed for fast wavelength switching in photonic packet switching. The integrated device, called a tunable duplex integrated light source comprises two distributed Bragg reflector lasers (DBR-LDs), two electroabsorption optical switches, a Y-shaped waveguide coupler, an electroabsorption modulator, and two thermal drift compensators (TDCs). The tuning range of the DBR-LDs is 3 nm, and the wavelength switching time of the optical switches is estimated to be 60 ps including a 50 ps rise time for the electrical pulse generator. The wavelength of a 10 Gb/s NRZ-modulated optical signal is switched without bit loss. Thermal crosstalk between the DBR-LDs, and wavelength drift of the DBR-LDs, which is due to a thermal transient, are effectively suppressed by thermal-drift-compensation operation using the TDCs
Keywords :
compensation; distributed Bragg reflector lasers; electro-optical modulation; electro-optical switches; electroabsorption; integrated optoelectronics; laser tuning; light sources; optical communication equipment; optical crosstalk; packet switching; semiconductor lasers; 10 Gbit/s; 50 ps; 60 ps; DBR-LDs; Gb/s NRZ-modulated optical signal switching; Y-shaped waveguide coupler; distributed Bragg reflector lasers; electrical pulse generator; electroabsorption modulator; electroabsorption optical switches; fast wavelength switching; monolithically integrated opto-electronic device; optical switches; photonic packet switching; ps rise time; thermal crosstalk; thermal drift compensators; thermal transient; thermal-drift-compensation operation; tunable duplex integrated light source; tuning range; wavelength switching time; wavelength-tunable duplex integrated light source; Distributed Bragg reflectors; Integrated optoelectronics; Laser tuning; Light sources; Optical packet switching; Optical switches; Optical waveguides; Packet switching; Tunable circuits and devices; Waveguide lasers;
Journal_Title :
Lightwave Technology, Journal of
