Title :
Fast and stable frequency switching employing a delayed self-duplex (DSD) light source
Author :
Ishida, Osamu ; Tada, Yasuhiko ; Shibata, Nori ; Ishii, Hiroyuki
Author_Institution :
NTT Transmission Syst. Labs., Yokosuka, Japan
Abstract :
A novel frequency-agile light source, the delayed self-duplex (DSD) light source, is constructed using a tunable DBR laser and an optical switch. The DSD light source overcomes the tuning speed limitation of the tunable laser, and also offers suppressed frequency drift due to the thermal effect by employing periodic laser tuning. For 160-GHz-spaced frequency switching, the 4-ns switching time and 2.2-GHz thermal frequency drift inherent to the DBR laser are reduced to 0.4 ns and 0.3 GHz, respectively.<>
Keywords :
distributed Bragg reflector lasers; electro-optical devices; infrared sources; laser tuning; optical switches; semiconductor lasers; 0.4 ns; 1.55 micron; delayed self-duplex light source; fast frequency switching; frequency-agile light source; optical switch; periodic laser tuning; stable frequency switching; suppressed frequency drift; switching time; thermal effect; thermal frequency drift; tunable DBR laser; tuning speed; Delay; Distributed Bragg reflectors; Fiber lasers; Frequency; Laboratories; Laser tuning; Light sources; Optical switches; Optical tuning; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
