Title :
Line narrowed picosecond pulse generation by gain switching in a multicontact distributed feedback laser
Author :
Griffin, P.S. ; White, I.H. ; Fice, M.J. ; Whiteaway, J.E.A.
Author_Institution :
Bath Univ., UK
Abstract :
The generation of line narrowed picosecond optical pulses, at gigabits/s repetition rates, has been achieved by gain switching a multiquantum well (MQW) distributed feedback (DFB) laser with an integral wavelength reference. Spectral linewidths as low as 0.6 Å have been obtained for the generated 30 ps pulses, substantially reduced from those possible using equivalent single contact devices. Near Fourier limited bandwidth products, as low as 0.26, are observed. Tuning of the wavelength has also been demonstrated by variation of the drive to the central region of the laser
Keywords :
distributed feedback lasers; high-speed optical techniques; laser tuning; semiconductor junction lasers; 30 ps; MQW DFB laser; gain switching; integral wavelength reference; laser drive variation; line narrowed picosecond optical pulses; multicontact distributed feedback laser; multiquantum well; near Fourier limited time-bandwidth products; spectral linewidths; wavelength tuning;
Conference_Titel :
Sources for Very High Bit Rate Optical Communication Systems, IEE Colloquium on
Conference_Location :
London
