PLI in the News 

May 1, 2008 Technical Color
Vision Systems Design

High-resolution linescan cameras use multichip designs and prisms to improve color fidelity>> More

Jan 2, 2008 Princeton Lightwave awarded $3.5M for single photon focal plane arrays

Princeton Lightwave, Inc. (PLI), a manufacturer of high-performance optical semiconductor components and sub-systems, has been awarded a two-year $3.5M contract for the development of focal plane arrays (FPAs) with single photon sensitivity for use in threedimensional (3-D) imaging systems at 1.06 μm. For this program, sponsored by the Defense Advanced Research Projects Agency (DARPA), PLI will develop FPA modules which employ InP-based Geiger-mode avalanche photodiodes (GmAPDs) to achieve single photon sensitivity and perform time-of-flight ranging measurements on a per-pixel basis. These modules are intended for use as the optical engines at the core of 3-D imaging flash ladar systems such as those demonstrated in DARPA’s Jigsaw program.
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Mar 9, 2007 Dual-band camera registers visible and near-IR images
Vision Systems Design

High-speed inspection systems for monitoring moving objects often struggle to obtain sufficient contrast between desirable and undesirable product attributes. To address this challenge, we have combined visible and near-infrared (near-IR) imaging in a single, dual-band camera that enables accurate sorting algorithms. Rather than trying to coregister the output of separate visible and IR cameras, this dual-band camera registers data from the same resolved spot at the same time and across a 60° field of view in both the 400- to 900-nm wavelength band and the 1100- to 1700-nm band. To ensure spatial registration, the two spectral bands must propagate with high efficiency through one lens system and be detected within an integrated package that includes a beamsplitter, an InGaAs array, and a CCD sensor.
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Jan 15, 2007

Princeton Lightwave Introduces the Next Generation Single Photon Counting Bench-top Receiver for Wavelengths from 1 to 1.5 µm

Princeton Lightwave (PLI) the leader in InGaAs APDs introduces the next generation Single Photon Counting Bench-top Receiver for wavelengths from 1 to 1.5 µm. The receiver offers the lowest dark count rate in the industry with highest detection efficiency. The low dark count rate is obtained by using PLI’s custom InGaAs Single Photon Counting Avalanche Photodiode (SPAD). In addition, the receiver offers an easy to use interface and remote operation.

The Single Photon Counting Bench-top Receiver has a comprehensive measurement in the range from 1 to 1.5 µm. The unit can operate from either the internal frequency generator or an external trigger at rates up to 20 MHz. An output from the internal frequency generator can be used to synchronize other equipment such as a laser source. All operating parameters such as bias voltage, SPAD temperature, trigger delay, and measurement interval are controlled from the front panel or through the RS-232 interface. The unit displays the number of photons detected as well as the number of trigger pulses in a user defined interval.
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Jan 3, 2007

Princeton Lightwave Introduces an Avalanche Photodetector Optimized for Photon Counting at 1.06 µm

Princeton Lightwave, Inc. (PLI), introduces the first Indium Phosphide single photon counting APD (SPAD) designed for optimum performance at 1.06 µm.

The PLI 1.06 µm SPAD bridges the performance gap between Silicon and conventional Indium Phosphide devices. Silicon, which reaches its maximum responsivity below 1µm suffers from very low detection efficiency at 1.06 µm. Alternatively, conventional Indium Phosphide SPADs, with a responsivity peak at 1.55 µm, have excellent detection efficiency but the excess noise generated by the unused spectrum increases the dark count rate at 1.06 µm.
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Nov 27, 2006

Princeton Lightwave wins contract for development of high power laser diodes

rinceton Lightwave, Inc. (PLI), the leading expert in high performance lasers and detectors in the 1 um to 2 um wavelength band, has been awarded a contract for the development of high power pump laser diodes based on the InGaAsP semiconductor materials system. During this two-year program, supported by $730,000 in funding from the Army , the company will deliver one-dimensional bars and two-dimensional stacks of 1470 nm multimode diode lasers optimized for the pumping of eye-safe solid state laser gain media such as Er:YAG.
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Apr 18, 2006

Princeton Lightwave Announces Production of Single Photon Detection Benchtop Receiver

Princeton Lightwave, Inc. (PLI), a manufacturer of high performance optical semiconductor components, announced the production of their single photon detection benchtop receiver. This unit is an essential component of quantum cryptography systems, which enable extremely secure communications even in the presence of eavesdropping
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