Quantum Well In-Line Power Montior

Abstract

Consistent with an aspect of the present disclosure, an apparatus is provided that includes a waveguide included in a photonic integrated circuit that is formed on a substrate. The waveguide includes a core layer that supports propagation of an optical mode having an evanescent tail. An absorbing layer is provided over a portion of the core, such that the evanescent tail of the optical mode extends into the absorbing layer to thereby generate electron-hole pairs in the absorbing layer and provide a photocurrent. The photocurrent can be monitored to indicate performance of devices on the PIC.

Dependencies are inferred from the claim text.