Title :
Relative intensity noise measurements of a widely tunable sampled-grating DBR laser
Author :
Shi, Hanxing ; Cohen, Dan ; Barton, John ; Majewski, Marian ; Coldren, Larry A. ; Larson, Michael C. ; Fish, Gregory A.
Author_Institution :
California Univ., Santa Barbara, CA, USA
fDate :
6/1/2002 12:00:00 AM
Abstract :
The intensity noise of a sampled-grating distributed Bragg reflector laser with 50-nm tuning range and 45-dB side-mode suppression ratio has been measured. The resonance frequency, damping factor, and modified Schawlow-Townes linewidth are extracted from the noise spectra. At high output power, the relative intensity noise (RIN) of the laser is below the photodiode shot noise limit, which is -160 dB/Hz. The laser has uniform shot noise limited RIN properties along the whole tuning range. The maximum resonance frequency is 5.4 GHz at a bias current of 120 mA and the K factor is 0.58 ns.
Keywords :
distributed Bragg reflector lasers; laser noise; laser tuning; optical transmitters; shot noise; spectral line breadth; waveguide lasers; wavelength division multiplexing; 120 mA; 5.4 GHz; K factor; WDM system; bias current; damping factor; high output power; modified Schawlow-Townes linewidth; noise spectra; photodiode shot noise limit; relative intensity noise measurements; resonance frequency; ridge waveguide structure; side-mode suppression ratio; tuning range; uniform shot noise limited RIN properties; widely tunable sampled-grating DBR laser; Damping; Distributed Bragg reflectors; Laser noise; Laser tuning; Noise measurement; Power lasers; Resonance; Resonant frequency; Signal to noise ratio; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.1003084
