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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1989),
  • paper TUJ19

High sensitivity optical analog link using an external modulator

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Abstract

We report an experimental optical analog link with an input rf sensitivity only 6 dB above the thermal noise limit and an intermodulation-free dynamic range (at a 10-Hz noise bandwidth) of 104 dB. The link contains no electronic amplifiers and yet still has an rf to rf gain of 11 dB at 60 MHz. This performance level was achieved by using a very sensitive external modulator and a diode pumped Nd:YAG laser source that coupled 55 mW of optical power into the input fiber.

© 1989 Optical Society of America

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