Title :
Mode-locked hybrid soliton pulse source with extremely wide operating frequency range
Author :
Morton, P.A. ; Mizrahi, V. ; Andrekson, P.A. ; Tanbun-Ek, T. ; Logan, R.A. ; Lemaire, P. ; Coblentz, D.L. ; Sergent, A.M. ; Wecht, K.W. ; Sciortino, P.F., Jr.
Author_Institution :
AT&T Bell Labs., Murray Hill, NJ, USA
Abstract :
The authors report a mode-locked pulse source with extremely wide operating frequency range and very stable operation, through the use of a long, linearly chirped Bragg reflector as the output coupler integrated in a fiber external cavity. A 1.55 mu m strained MQW laser diode is used, with one facet high reflectivity (HR) coated for improved cavity Q, and the other antireflection (AR) coated to allow coupling to the external cavity and suppress Fabry-Perot modes. Near-transform-limited pulses are obtained over a frequency range of 700 MHz around a system operating frequency of 2.488 GHz, with pulsewidths of 50 ps, as required for a practical soliton transmission system.<>
Keywords :
distributed Bragg reflector lasers; integrated optics; laser cavity resonators; laser mode locking; optical fibres; optical solitons; semiconductor lasers; 1.55 micron; 2.488 GHz; 50 ps; antireflection coating; cavity Q; extremely wide operating frequency range; fiber external cavity; high reflectivity coating; hybrid soliton pulse source; integrated reflector; linearly chirped Bragg reflector; mode-locked pulse source; near transform limited pulses; output coupler; pulsewidths; soliton transmission system; strained MQW laser diode; very stable operation; Frequency; Laser mode locking; Laser theory; Optical attenuators; Optical pulses; Optical pumping; Optical solitons; Pulse amplifiers; Semiconductor optical amplifiers; Space vector pulse width modulation;
Journal_Title :
Photonics Technology Letters, IEEE
