Title :
Integrated electroabsorption modulator/DBR laser linearized by RF current modulation
Author :
Wilson, G.C. ; Wood, T.H. ; Koren, U.
Author_Institution :
Crawford Hill Lab., AT&T Bell Labs., Holmdel, NJ, USA
Abstract :
We measure the two-tone intermodulation distortion of an electroabsorption modulator integrated with a DBR laser. Driving the modulator with an ac current yields a significant improvement in linearity over conventional voltage modulation at RF frequencies up to 10 MHz with more than 13 dBc reduction in the minimum distortion values at 0.5 MHz. High-frequency performance is presently limited by the capacitance loading the current drive.<>
Keywords :
cable television; distributed Bragg reflector lasers; electro-optical modulation; electroabsorption; integrated optics; intermodulation distortion; semiconductor lasers; 0.5 to 10 MHz; 1.55 mum; AC current driving; CATV systems; DBR laser; RF current modulation linearization; RF drive; high-frequency performance; integrated electroabsorption modulator; low chirp analog optical source; minimum distortion values; optical modulation depth; two-tone intermodulation distortion; Capacitance; Chirp modulation; Distortion measurement; Distributed Bragg reflectors; Frequency modulation; Intermodulation distortion; Laser noise; Linearity; Radio frequency; Voltage;
Journal_Title :
Photonics Technology Letters, IEEE
