New Focus high-speed photoreceiver ideal for swept-source OCT

The GHz Nirvana high-speed photoreceiver from New Focus, a Newport Corp. brand, includes the company's auto-balance feature to eliminate thermal drift, wavelength dependence, and the need to optically balance the detectors.

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The GHz Nirvana high-speed photoreceiver from New Focus, a Newport Corp. brand (Santa Clara, CA), includes the company's auto-balance feature to eliminate thermal drift, wavelength dependence, and the need to optically balance the detectors. Features include an operating wavelength range of 900–1650 nm to cut laser noise effects by 25 dB, rise time <1 ns, and peak responsivity at 30,000 A/W. When used in swept-source optical coherence tomography (SS-OCT), the photoreceiver uses both high-speed balanced and auto-balanced detection, the former of which allows subtraction of all common-mode noise and resolves low scattering features deep in the sample.

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New Focus Introduces the High-Speed GHz Nirvana Receiver with Automatic Balancing

Santa Clara, CA – July 20, 2011 – New Focus™, a Newport Corporation Brand, introduces the GHz Nirvana™ High Speed Receiver, the world's only photoreceiver with automatic balancing. The new GHz Nirvana features 2000 times higher bandwidth and new fiber coupling, along with completely automatic signal balancing. Our patent-pending auto-balance feature allows elimination of background noise from dynamically changing systems, including thermal drift and wavelength dependence, allowing you to achieve perfect power balance between the reference and signal beams. It also eliminates the need to optically balance the detectors, simplifying optical and electrical alignment. The user can also balance in optical and manual modes, if desired.

The auto-balancing feature and variable gain increase the receiver's flexibility and ease-of-use, and enable the user to adjust the detector instead of having to adjust components such as optics, lasers, samples, etc. used in an application. While manually balanced and auto-balanced modes can produce similar results for slow changes in split ratio, the auto-balance feature enables measurement systems that can accommodate drift over time.

The GHz Nirvana Receiver has an operating wavelength range of 900 - 1650 nm and can cut the effects of laser noise by 25 dB, making even very small signals easy to see. Rise time is less than 1 ns and peak responsivity is 30,000 A/W.

The receiver is ideal for use in commercial systems where easy assembly and reliable performance over both time and temperature are critical. It also improves the performance of swept-source optical coherence tomography (SS-OCT) using both high-speed balanced and auto-balanced detection. In this application the balanced detection allows subtraction of all common-mode noise and improves the ability to resolve low scattering features deep in the sample.

For more information on New Focus’ GHz Nirvana Receiver, please visit: www.newport.com/Nirvana-PR03.

About Newport Corporation

Newport Corporation is a leading global supplier of advanced-technology products and systems to customers in the scientific research, microelectronics manufacturing, aerospace and defense/security, life and health sciences and precision industrial manufacturing markets. Newport's innovative solutions leverage its expertise in high-power semiconductor, solid-state and ultrafast lasers, photonics instrumentation, sub-micron positioning systems, vibration isolation, optical subsystems and precision automation to enhance the capabilities and productivity of its customers' manufacturing, engineering and research applications. Newport is part of the Standard & Poor's SmallCap 600 Index and the Russell Microcap Index.

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Posted by Lee Mather

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