High Optical Power Handling Balanced Photodiodes to 5 GHz Bandwidth for Quantum Key Distribution (QKD)


Ewing, NJ - January, 2017

Discovery Semiconductors, an industry leader in manufacturing balanced detectors since 2001, introduces its high power balanced photodiodes to 5 GHz bandwidth. The DSC705 is a balanced InGaAs photodiode in "push-pull" configuration with each photodiode capable of handling high optical power up to +17 dBm (50 mW). As a pair, they will handle +20 dBm (100 mW).

Typical saturation current of individual photodiodes in dsc705

Fig. 1: Typical Saturation Current of Individual Photodiodes in DSC-705

These InGaAs balanced photodiodes are ideal for Quantum Key Distribution (QKD) detection schemes as they are shot noise limited. The broad wavelength response (1060 nm through 1650 nm) of these photodiodes allows for one device for multiple wavelengths, and reduces operational and inventory cost. Additionally, they are well suited for applications using high LO powers up to +20 dBm, such as Coherent LIDAR with high dynamic range.

"Discovery Semiconductors has been a leader in supplying key balanced receivers for QKD community. As cyber security gains prominence, this new balanced photodiode offers another option," commented Abhay Joshi, President and CEO.

Typical of Discovery Semiconductors' product line, these high powered InGaAs balanced photodiodes are available in either a K connectorized package or Discovery's easy-to-use, self-contained Lab Buddy instrument.

DSC-705 High power balanced photodiode module and lab buddy

Fig.2: DSC-705 High Power Balanced Photodiode module and Lab Buddy

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Discovery Semiconductors is an industry leader in manufacturing ultrafast, high optical power handling InGaAs photodiodes, radio frequency over fiber optical receivers, balanced optical receivers and several other custom products for applications ranging from analog RF links to ultrafast digital communications.

For additional information, including complete product specifications, operational capabilities and pricing, or to discuss your application in detail, please call Discovery at: (609) 434-1311 or fax: (609) 434-1317.

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