By controlling the thickness of the grating depth with chemical beam e
pitaxy (CBE) growth time, we report in this letter the design and perf
ormance of an integrated tunable detector. A carefully designed tunabl
e active filter, which allows only one below threshold Fabry-Perot mod
e for operation, is integrated with a waveguide detector. The full tun
ing range of this kind of tunable device can now be utilized for syste
m applications.