A. R. Kerr has written:

'Stability of parametric amplifiers' -- subject(s): Parametric amplifiers

Anders Bjarklev has written:

'Optical fiber amplifiers' -- subject(s): Fiber optics, Lasers, Optical amplifiers, Optical communications

'Photonic Crystal Fibers'

F J. Armstrong has written:

'Parametric performance of transistor amplifiers and converters'

Microwave and audio parametric amplifiers were used as low-noise amplifiers, to process low-level signals. Therefore their non-linearity probably never occurred in use.

In principle, Manley-Rowe theory holds for any frequency combination, and should apply also in optics. I am not aware about the application in optics but it is clearly possible.

In optical spectrum (frequencies above IR), however, quantum noise prevails above thermal noise, so low-noise amplification is usually not needed or not possible.

Finisar is an electronics manufacturing company based in Sunnyvale, California, USA. They specialise in products related to optical communications such as optical amplifiers and optical modules.