For this SBIR program, Princeton Lightwave Inc. proposes the development of 1530 nm InGaAsP/InP laser diode pump arrays with powers in excess of 50 W from 1-cm bars with the potential for scalability to a two-dimensional bar stack format without limitation in the number of one-dimensional array… More

In this program, we will develop room-temperature avalanche photodiodes (APDs) for midwave infrared (MWIR) applications. The internal gain of APDs results in significant improvements in optical receiver sensitivity, and APDs have been widely used for telecommunications receivers with… More

APDs offer tremendous potential for the numerous applications in which photon densities are extremely low and the ability to count single photons is essential. Researchers have recently found that the optimization of InP-based APDs for counting photons may require innovative design approaches that… More

In this program, we propose to develop high-performance long-wavelength infrared (LWIR) photodetectors based on InAs/In(x)Ga(1-x)Sb Type II superlattice structures. The use of bandgap engineering approaches to control quantum confinement and strain effects allows for wide tunability of the… More

For Phase II of this program, Princeton Lightwave Inc. proposes to develop high power 1470 nm InGaAsP/InP diode laser arrays and stacks with dramatic improvements relative to the current state-of-the-art performance for threshold, differential efficiency, and wall-plug efficiency. These lasers will… More

The need for higher performance fiber optic telecommunications receivers has provided the impetus for substantial progress during the last decade in the understanding and performance of InP-based linear mode avalanche photodiodes (APDs) for the wavelength range from 1.0 to 1.7 um. However, these… More

The need for higher performance fiber optic telecommunications receivers has provided the impetus for substantial progress during the last decade in the understanding and performance of InP-based linear mode avalanche photodiodes (APDs) for the wavelength range from 1.0 to 1.7 um. However, these… More

Growing interest to high power lasers in the eye-safe spectral domain has initiated a wave of activity in developing solid-state lasers based on Er3+-doped materials. Impressive results have been demonstrated in resonantly pumped Er:YAG based lasers. Cryogenic cooling of the laser crystal has… More

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This Small Business Innovation Research (SBIR) Phase I project seeks to develop a novel electro-optical day/night vision sensor for man-portable surveillance applications. The proposed solid-state… More

Fiber coupled pump source is solicited with a desired power of 50W into a 300 micron fiber core, spectral stability at 1470nm or 1532nm, and a line width smaller than 0.5nm. We present several concepts to be studied to develop this pump laser based on our existing design capabilities and experience.… More

From the perspective of performance, reliability, and cost, the most practical photodetector available today with single photon sensitivity between 1.0 and 1.6 ?m is the InGaAs/InP single photon avalanche diode (SPAD). However, even the best InP-based SPADs have photon counting rate limitations of… More

Optical imaging sensors are a critical technology for the warfighter. These sensors operate across the entire wavelength spectrum. They have been deployed across all military platforms especially ground vehicles, aircraft, and satellites. A key issue in increasing image resolution and lowering… More

For this program, we propose to develop large pixel-count single photon counting detector arrays suitable for deployment in spacecraft terminal receivers supporting long-range laser communication systems at 1.5 um. To surmount the present obstacles to higher photon counting rate -- as well as the… More

From the perspective of performance, reliability, and cost, the most practical photodetector available today with single photon sensitivity between 1.0 and 1.6 m is the InGaAs/InP single photon avalanche diode (SPAD). However, even the best InP-based SPADs generally have photon counting rates… More

This work is focused toward developing disruptive hybdrization techniques for imaging focal plane arrays in which the optical detector material system is different from the silicon material used for processing, amplifying and reading out the opto-electronic signals. In these cases, the detector… More

Growing interest in high-power lasers in the eye-safe spectral domain has instigated the development of solid-state lasers based on Er(3+)-doped materials. Impressive results have been demonstrated in resonantly pumped lasers based on Er:YAG crystals, and cryogenic cooling of the laser crystal has… More

Growing interest in high power and efficient lasers in the 20,300 cm-1 to 21,800 cm-1 region has emerged for numerous underwater applications due to the high transmission in this spectrum. Applications include underwater range finding, underwater surveillance from airborne platforms and ship to ship… More

For this program, we propose to develop large pixel-count single photon counting detector arrays suitable for deployment in spacecraft terminal receivers supporting long-range laser communication systems at 1.5 um. To surmount the present obstacles to higher photon counting rate -- as well as the… More

For this NASA STTR program, we propose to develop a novel superlattice-based near infrared to midwave infrared avalanche photodetector (APD) grown on InP substrates for single photon counting applications at high operating temperatures on the order of 200K accessible using thermoelectric coolers.… More

In the past few years, there have been promising demonstrations of new approaches to short-gate (i.e., sub-nanosecond) operation of single-photon avalanche diodes (SPADs) with gating frequencies as high as 2 GHz. However, these demonstrations have had limitations, including operation at just a… More

ABSTRACT: We propose to develop modeling and initial concept feasibility demonstration for MWIR lasers that span the 2.4-4 um wavelength span. The laser active region design is based on a novel quantum well design that is grown on InP substrates. The laser will leverage our team's recent… More

A low cost, low noise, narrow linewidth, high power laser is proposed using semiconductor laser and scalable manufacturing technologies. The underlying technology is an external cavity laser leveraging existing materials and processes developed for the telecommunication industry. The target… More

For this SBIR program, we propose to demonstrate a solid state short-wave infrared (SWIR) detector technology with true single photon sensitivity with a cutoff wavelength of at least 2.2 um suitable for integration into large-format focal plane arrays (FPAs). Array pixel designs will include… More

Future NASA LIDAR missions require low noise and large area photodetectors operated at short-wave infrared (SWIR) wavelengths. Silicon avalanche photodiodes have very low responsivity for wavelength longer than 1.1 um; and while InP-based APDs have high responsivity in the SWIR region, they exhibit… More

Growing interest in precise measurements of methane concentration and distribution in the Earth's atmosphere is stimulating efforts to develop LIDAR systems in the spectral region of 1.65 um utilizing Path Differential Absorption techniques. The key element of such systems is a high energy… More

Shortwave Infrared (SWIR) imaging has significant advantages over image intensifiers for low light level applications. Although the low light level performance with SWIR imagers has moved towards parity with image intensifiers, widespread deployment has not been possible because of severe SWaP and… More