Integrated optical system-based optical detection device

Abstract

Provided is an optical detection device for sensing environmental changes inside and outside a fiber optic sensor probe by detecting polarization and optical power differences between a plurality of input signals, the optical detection device being characterized by comprising: a plurality of optical fiber pigtail blocks internally accommodated with a portion of the optical fibers; an integrated optical system composed of a plurality of optical components optically bonded to the optical fiber pigtail blocks at interfaces with the bulk optical components; and a balanced optical detection component for comparing components of a plurality of polarized lights received from the integrated optical system.