Frequency Tracking of a Sampled Grating Distributed Bragg Reflector (SG-DBR) Laser After a Switching Event

• Published in: IET Conference Proceedings p. 57G
• Main Authors: Mountjoy, J, Cardiff, B, Fagan, A.D
• Format: Conference Proceeding
• Language: English
• Published: Stevenage, UK IET 2012; The Institution of Engineering & Technology
• Subjects: Design of specific laser systems; Laser beam modulation, pulsing and switching; mode locking and tuning; Lasing action in semiconductors; Multiplexing and switching in optical communication; Optical communication devices, equipment and systems; Optical communication equipment; Semiconductor lasers; optical switches; optical burst switching; frequency tracking; laser phase; sampled grating distributed Bragg reflector laser; phase locked loops; PLL; optical burst switching network; second-order digital phase locked loop; SG-DB laser; OBS network; laser mode locking; distributed Bragg reflector lasers; optical communication equipment; semiconductor lasers; laser switching
• ISBN: 9781849196130; 1849196133
• DOI: 10.1049/ic.2012.0202

The paper reports some initial findings in the area of analysis and characterisation of fast switching lasers, specifically Sampled Grating Distributed Bragg Reflector (SG-DBR) lasers. The ability to track the phase of a laser in the moments immediately following a switching event is an important building block in the development of an efficient Optical Burst Switching (OBS) network. In this paper it is reported, for the first time, that the use of a second-order digital Phase Locked Loop (PLL) can accomplish this task quickly and accurately without the need for programming or a-priori knowledge of the switching event per se. (5 pages)