Nonlinear optical modulation combined with simultaneous photonic and RF resonance in an LiNbO3 microdisk modulator is used to create a self-homodyne photonic RF receiver. Carrier and sidebands are mixed in the optical domain, and the modulated optical signal is detected using a photodetector. The photodetector has a bandwidth matched to the baseband signal. It filters out the high-frequency com...

Photomultiplier tube (PMT) receiver is a promising solution for long-distance underwater wireless optical communication (UWOC) due to its characteristics of high gain, low noise, and large area. However, the complex environment leads dynamic change received intensity impacts stability reliability UWOC system using PMT. In this work, bandwidth limitation performance degradation caused by PMT sat...

Design and implementation of a 2.5Gb/s CMOS transmitter and a 1.3Gb/s receiver for optical interconnections are presented. The transmitter accepts LVDS signals and converts it into optical signals. The receiver receives the optical signals and recovers it to LVDS signals. They are designed and implemented in standard 0.25um CMOS process using 1-poly and 5-metal layers. The 850nm VCSEL is assume...

A GaAs integrating optical receiver has been designed and realized using a commercial foundry process. The receiver was then transplanted by epitaxial lift off (ELO) onto an InP substrate. This technology allows the monolithical integration of previously incompatible materials onto one chip. To our knowledge the chip described is the most complex chip that has been transplanted by ELO. The inte...

In this paper, we explain the experimental characterization of indoor infrared channels that use intensity modulation with direct detection. The measurement set up consists of an optical transmitter with an infrared LED and an optical receiver with a photodiode. The frequency response is plotted for different receiver locations without changing the transmitter location. From this we compute the...

An optical receiver concept for binary signals with performance approaching the quantum limit at low average-signal energies is developed and analyzed. A conditionally nulling receiver that reaches the quantum limit in the absence of background photons has been devised by Dolinar. However, this receiver requires ideal optical combining and complicated real-time shaping of the local field; hence...

This proposal concerns component development for a novel hybrid lidar-radar system for underwater surveillance. Computer simulations and laboratory measurements of pulsed lidar revealed a 17 dB suppression of the water backscatter signal (clutter) and corresponding target contrast enhancement. Preliminary ocean experiments have confirmed the potential of pulsed lidar to be a superior detection ...

Time of flight laser range finding, scanning video imaging and deep space communications are three applications requiring very low noise optical receivers in order to achieve detection of fast and weak optical signal. Avalanche photodiode is the detector of choice for its high quantum efficiency, compact size and reduced electronics complexity. Optimal operating condition in terms of gain and t...

Theoretical performance and preliminary experimental verification of a twotelescope optical array receiver, currently under development at the Jet Propulsion Laboratory as part of a research and technology development effort, is described in this article. A brief summary of optical communications theory for array reception of pulsed laser signals is developed, and the application of coding to o...