Title :
Fabrication and lasing characteristics of λ=1.56 μm tunable twin-guide (TTG) DFB lasers
Author :
Schanen, C.F.J. ; Illek, S. ; Lang, H. ; Thulke, W. ; Amann, M.-C.
Author_Institution :
Siemens AG, Res. Labs., Munchen, West Germany
fDate :
2/1/1990 12:00:00 AM
Abstract :
The operation principle and fabrication process of the tunable twin-guide (TTG) DFB laser diode are presented. The TTG-DFB laser is a novel single-frequency tunable laser which needs only a single control current for a wide continuous tuning range. Very low CW threshold currents of 12-18 mA at room temperature, spectral linewidths as low as 20-30 MHz, and a continuous tuning range of 1.5 nm at a tuning current of 60 mA are obtained with first, still non-optimised devices. The threshold current and spectral line-width vary only slightly over the entire tuning range
Keywords :
III-V semiconductors; distributed feedback lasers; gallium arsenide; gallium compounds; indium compounds; laser tuning; semiconductor junction lasers; 1.56 micron; 12 to 18 mA; 60 mA; CW threshold currents; InGaAsP-InP; fabrication; lasing characteristics; operation principle; semiconductor laser; single control current; single-frequency tunable laser; spectral linewidths; tunable twin guide DFB laser; tuning current; wide continuous tuning range;
Journal_Title :
Optoelectronics, IEE Proceedings J
