W. Vanderbauwhede et al., WAVELENGTH TUNING BY QUANTUM-WELL ELECTROREFRACTION IN A GRATING-ASSISTED VERTICAL COUPLER FILTER WITH INGAASP INALGAAS MQW WAVE-GUIDE/, Optical and quantum electronics, 28(5), 1996, pp. 583-590
We present the first demonstration of E-field tuning of an InP-based g
rating-assisted vertical codirectional coupler filter with an InAIGaAs
/lnGaAsP MQW region in one of the waveguide cores. This filter exhibit
s 16 nm tuning by QW-electrorefraction, which is the highest value rep
orted to our knowledge. The device has 3.2 nm bandwidth at 1568 nm for
1.6 mm interaction length, very low losses, good sidelobe suppression
, high coupling efficiency and a modified polarization dependence.