Am. Sarangan et al., WAVELENGTH CONTROL IN DFB LASER ARRAYS BY TILTING THE RIDGE WITH RESPECT TO THE GRATINGS, IEEE photonics technology letters, 8(11), 1996, pp. 1435-1437
Experimental and simulation results on ridge waveguide DFB lasers with
tilted stripes with respect to the gratings is presented in this lett
er. It is shown that in addition to the lasing wavelength, the couplin
g efficiency (kappa) is also a strong function of tilt angle. This res
ults in a higher threshold current and a smaller stop-band width, and
limits the maximum wavelength tuning range that can be achieved using
this scheme.