ABSTRACT We have developed an image-sensor-based optical receiver for free-space optical communications. In our scheme, each pixel has a function of an optical receiver as well as an image sensor. The functional mode can be selected pixel by pixel. The position of a communication target is detected from the image captured in the image sensor mode. Then, functional mode of the pixel receiving op...

We present a comprehensive treatment of optically preamplified direct detection receivers for non-return-to-zero (NRZ) and return-to-zero (RZ) on/off keying modulation, taking into account the influence of different (N)RZ optical pulse shapes, specified at the receiver input, and filter transfer functions; optical Fabry–Pérot filters (FPFs) and Bragg gratings as well as electrical fifth-order B...

We consider short-range (1-3-km) free-space optical communication between moving parties when covertness is the overriding system performance requirement. To maximize covertness, it is critical to minimize the time required for the acquisition phase, during which the party initiating contact must conduct a broad-field scan and so risks revealing his position. Assuming an elliptical Gaussian bea...

We propose and demonstrate a 1.45GHz bandwidth optical phase-lock loop receiver for linear optical phase demodulation. Using the receiver in a link application, a spurious free dynamic range of 125 dBHz is measured at 300MHz. ©2007 Optical Society of America OCIS codes: (250.3140) Integrated optoelectronic circuits, (060.1660) , Coherent communications (060.5060), Phase modulation, (060.2360) F...

A bandwidth adjustable integrated optical receiver having an on-chip silicon avalanche photodetector is realized with standard 0.25-μm silicon-germanium bipolar complementary metal-oxidesemiconductor technology for optical interconnect applications. With the controllable capacitive degeneration technique, the optical receiver bandwidth can be adjusted for the best bit error rate performance.

High Speed Integrated Circuits for High Speed Coherent Optical Communications by Hyun-chul Park With the development of (sub) THz transistor technologies, high speed integrated circuits up to sub-THz frequencies are now feasible. These high speed and wide bandwidth ICs can improve the performance of optical components, coherent optical fiber communication, and imaging systems. In current optica...