Photonics

GaSb-Based Diode Lasers for Remote Detection of Carbon Dioxide

Lidar systems measure carbon dioxide to understand better the impact of the carbon cycle on global warming and climate change. Monolithic ridge-waveguide GaSbbased diode lasers were fabricated with a second-order, laterally etched Bragg grating to generate single-mode emission from InGaAsSb/AlGaAsSb multiquantum- well structures. In this design, the monolithic Type-I GaSb-based diode lasers use grating structures that exhibit low internal loss. The frequency-stable diode lasers meet the needs of high power (>50 mW) and narrow linewidth (≈100 kHz). These devices are strong candidates for replacement of the solidstate light sources. Furthermore, this design is not limited to this wavelength. By optimizing the quantum well, and the optical design, this innovation can adapt to any wavelength within the 2-to-3-μm spectral window with similar performance.

Posted in: Photonics, Briefs

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Optical Tunable-Based Transmitter for Multiple High-Frequency Bands

Applications include satellite communications, optical communications networks, and RF antenna applications. The purpose of this innovation is to be able to deliver, individually or simultaneously, multiple microwave high-frequency bands including, but not limited to, L (1.5 GHz), C (7 GHz), X (8.4 GHz), Ku (14.5 GHz), Ka (32 GHz), and Q (38 GHz) frequencies at high data rates and with minimal hardware, particularly for use in satellite-to-satellite communications applications. Additionally, this innovation would be a satellite-based transmitter with a significant reduction in weight, mass, and power when compared to current, conventional technologies.

Posted in: Physical Sciences, Photonics, Briefs

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A High-Repetition-Rate Seeded Optical Fiber Amplifier (SOFiA) for the LIST Mission and Next-Generation Satellite Laser Ranging

A document describes a fiber/solid-state hybrid seeded regenerative amplifier capable of achieving high output energy with tunable pulse widths for satellite laser ranging (SLR) applications. The diode-pumped solid-state (DPSS) regenerative amplifier cavity utilizes a pair of Nd:YAG zigzag slabs oriented orthogonally to one another in order to circularize thermal lensing effects and simplify optical correction schemes. The short-pulsed seed laser is a fiber-coupled 1,064-nm narrow-band (<0.02 nm) diode laser that is intensity modulated by a fiber Mach-Zehnder electro-optic modulator, enabling continuously tunable seed pulse widths in the 0.2-to-2.0-ns range.

Posted in: Photonics, Briefs

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Motorized Zoom Lens

Resolve Optics (Chesham, Bucks, UK) has developed a variant of its Model 207 miniature motorised zoom lens, enabling a manufacturer of remotely operated vehicles (ROV’s) to help improve the deep sea welding capability of their system.

Posted in: Products, Photonics

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Galvanometer-Based Optical Scanner

ScannerMAX (Orlando, FL) recently announced the release of the all new Compact- 506 model optical scanner. The Compact-506 is built upon ScannerMAX’s patented VRAD actuator platform and features a very strong rotor construction and 6mm bearings, allowing it to move small mirrors as well as very large mirrors up to 1-inch in diameter.

Posted in: Products, Photonics

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Handheld Raman Spectrometer

Ocean Optics (Dunedin, FL) has released the IDRaman mini handheld Raman spectrometer, a small, powerful instrument for sample authentication and counterfeit detection, identification and verification. The palm-sized IDRaman delivers fast, accurate Raman analyses ranging from chemical and explosive agent detection in the field to quality assurance and quality control sampling routines in the laboratory.

Posted in: Products, Photonics

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2.8 MP USB 3.0 Scientific Imaging Camera

Point Grey (Richmond, BC) announced a new addition to the Grasshopper3 scientific imaging camera family that features high quality, high resolution CCD sensors with a USB 3.0 interface. The new Grasshopper3 GS3-U3-28S5 camera models are based on color and monochrome versions of the fast and highly sensitive Sony ICX674, a 2/3" CCD featuring 4.54 micron square pixels and capable of sending 1932 x 1452 images at 26 FPS. The ICX674 sensor supports high definition (HD) 1080p30 imaging and uses Sony's EXview HAD CCD II™ technology—a further evolved version of the well-known EXview HAD CCD™ technology—to improve quantum efficiency and increase sensitivity, including into the near infrared. The GS3-U3-28S5 offers quantum efficiency of 67% at 525 nm, a dynamic range of 63 dB, dark current of 1.27 e-/second, and supports long exposures up to 30 seconds.

Posted in: Products, Photonics

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