Title :
Switching-time limitation in tunable multisection lasers
Author :
De Vera, E. G Vicente ; Glance, B.
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
Abstract :
The impact of the thermal transient on the frequency switching of multisection tunable lasers is studied. A simple thermal model is used to calculate the amplitude and time evolution of the frequency transient due to the thermal properties of both the laser chip and its mount. Transient time constants as large as 200 mu s for the laser chip and several hundred milliseconds for the diode mount are measured, limiting the applicability of these devices to systems where the frequency is switched at low rates. A method to compensate electrically for this transient by means of a passive net work is demonstrated.<>
Keywords :
compensation; high-speed optical techniques; laser theory; laser tuning; optical bistability; semiconductor device models; semiconductor junction lasers; thermo-optical effects; 200 mus; amplitude evolution; diode mount; electrical laser transients compensation; frequency switching; frequency transient; laser chip; laser mount; lower laser frequency switching rates; passive net work; thermal model; thermal properties; thermal transient; time constants; time evolution; tunable multisection lasers; Charge carrier density; Distributed Bragg reflectors; Frequency shift keying; Laser feedback; Laser modes; Laser tuning; Packet switching; Semiconductor lasers; Tunable circuits and devices; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
