Title :
A high-speed mixed digital-to-analog circuit board for accurate control of wavelength tunable lasers for fiber-optic communications
Author :
Biemacki, P.D. ; Frankel, Michael Y. ; Gingerich, Michael E. ; Matthews, Paul J.
Author_Institution :
Naval Res. Lab., Washington, DC, USA
fDate :
7/1/1999 12:00:00 AM
Abstract :
A mixed digital-to-analog (D/A) high speed circuit board capable of driving a tunable super structure grating distributed Bragg reflector (DBR) laser is developed. The circuit is used to control the laser over a 20-nm tuning wavelength range with 0.1 nm resolution. Three control currents are preprogrammed into an electrically erasable/programmable read-only memory (EEPROM) look-up table for each wavelength. Upon receiving a differential logic control signal, the circuit tunes the laser to the specified output wavelength within 500 ns. The long-term repeatability of the tuned laser output wavelength shows drift below ±0.02 nm with greater than 100 h of operation
Keywords :
Bragg gratings; EPROM; driver circuits; integrated circuit testing; laser tuning; life testing; logic circuits; mixed analogue-digital integrated circuits; optical communication equipment; wavelength division multiplexing; 100 h; 500 ns; EEPROM look-up table; accurate control; control currents; differential logic control signal; electrically erasable; fiber-optic communications; high-speed mixed digital-to-analog circuit board; life testing; long-term repeatability; nm tuning wavelength range; programmable read-only memory; specified output wavelength; tunable super structure grating DBR laser driving circuits; tuned laser output wavelength; wavelength tunable lasers; Bragg gratings; Circuit optimization; Distributed Bragg reflectors; EPROM; Laser tuning; Optical control; PROM; Printed circuits; Signal resolution; Tunable circuits and devices;
Journal_Title :
Lightwave Technology, Journal of
