Spectrodetector: Novel Monolithic Wavelength Meter and Photodetector

R.F. Nabiev, C.J. Chang-Hasnain, L.E. Eng, E.L. Ginzton Laboratory, Stanford University, Stanford, Calif., and K.Y. Lau, University of California Berkeley, Berkeley, Calif.

Recently, we have introduced and demonstrated a novel approach using the ratio of two back-to-back detectors with a wavelength dependent reflector (Distributed Bragg Reflector, DBR) in between.5 The DBR is designed to have a weak wavelength-dependent reflectance which provides the necessary spectral dependent ratio for the two detectors. This ratio has a one-to-one correspondence with the signal wavelength, and thus can be used as a wavelength meter. Each photodetector can still be used as a receiver for data in addition to the wavelength reading.

Log in or become a member to view the full text of this article.

This article may be available for purchase via the search at Optica Publishing Group.
Optica Members get the full text of Optics & Photonics News, plus a variety of other member benefits.

Add a Comment