Features

Thulium Puts Power Behind Eyesafe Fiber Lasers

One of the key advantages of fiber laser technology stems from the high conversion efficiency of the multimode pump radiation into high-brightness, single-mode laser light within the doped fiber lasing medium. Ytterbium-doped fiber lasers operating around 1μm often achieve around 80% pump- to-laser conversion efficiency and corresponding wall plug efficiencies over 25%, depending on the pump diodes used in the laser. As a result, high-power CW fiber lasers are more compact and require less cooling than a traditional solid-state laser of similar power.

Posted in: Articles, Features, ptb catchall, Photonics

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Reactive Solders Improve Fiber Couplers and OE Bonding

Optical and optoelectronic (OE) devices are being rapidly integrated into many facets of everyday life. From telecommunications to sensor applications, these devices are expected to perform accurately and reliably for long periods of time.

Posted in: Application Briefs, Applications, ptb catchall, Photonics

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Product of the Month: HPL Diodes, Bars, and Stacks

Intense, Ltd. (Glasgow, UK) released Hermes™, a family of High Power Laser (HPL) products. Included are single emitters, bars, conductively and micro-channel cooled bars, and stacks. The single emitters have wavelengths of 808 nm (up to 5 W), 940 nm (up to 7 W), and 980 nm (up to 7 W). The bars are at 808 nm and 940 nm (both up to 100 W), while the conductively cooled bars are 808 nm (up to 60 W) and the micro-channel cooled bars are 808 nm (up to 100 W). The stack is 808 nm (up to 805 W). The devices operate in both continuous-wave and quasi-continuous-wave modes. The line is designed for use in industrial, medical, defense, and aerospace applications.

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Dichroic Filter

Patterned dichroic filters from Deposition Sciences, Inc. (Santa Rosa, CA) operate over a wide range of wavelengths, from near ultraviolet to infrared. Able to be applied in a variety of substrates in multiple shapes and sizes, the filters maintain stability in extreme temperatures and conditions. Additionally, they may be applied to wafer substrates up to 100 mm in diameter in materials such as glass, silicon, sapphire, and fused silica. Coatings are applied on a single substrate with dimensions down to 100 microns, an accuracy of ±1 micron, and feature placement accuracy of ±5 microns. Applications include optoelectronic and opto-mechanical devices, satellites, and aircraft.

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Laser-Scanning Probe

Laser Design (Minneapolis, MN) released the SLP-2000 3D laser-scanning probe with an extra-long-laser line (8") and standard dual CMOS receptors. The device captures 50,000 to 75,000 points per second. The probe is integrated with Surveyor Scan Control software and Surveyor 3D scanning systems, and can be used interchangeably with portable Faro CMMs, traditional CMMs, and the Surveyor DS, CS, DT, and TS-Series 3D laser-scanning systems. The probe weighs less than one pound.

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Polarimeter

The P-2000 multi-option polarimeter from JASCO (Easton, MD) is designed to be customizable with options to handle a researcher’s initial requirements and then upgraded at a later date. The unit can operate via a PC with Windows® software or by JASCO’s handheld controller (iRM). The device has a range of light sources: tungsten-halogen, sodium, or mercury lamps. Up to two sources can be simultaneously installed, from the UV-V region (254 nm) to the NIR region (880 nm). Sample temperature is available at ±0.1°C accuracy.

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Image Simulation

The 2D Image Simulation feature in CODE V® 9.7 from Optical Research Associates (Pasadena, CA) allows users to visualize overall performance and communicate design tradeoffs to non-optical personnel. The function displays an object as it would appear when imaged by an optical system, taking into account diffraction, lens aberration, distortion, relative illumination, and blurring. Image orientation for complex folded systems also is determined. Results may be saved in BMP, JPEG, and PNG formats. Other features include enhanced ID Partial Coherence function and a Gaussian Quadrature Radial Grid for defining ray sets speeds optimization of systems having circular or vignetted circular pupils.

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