Closest thing I can think of is an erbium doped amplifier. A "pump laser" at one wavelength excites erbium molecules buried in the glass, and the erbium emits photons at the signal wavelength to juice it up for a longer ride down the line.
.....but the changing wavelength isn't the feature, it's the amplifying that's the feature. -----Original Message----- From: AF <af-boun...@af.afmug.com> On Behalf Of Mark Radabaugh Sent: Monday, February 21, 2022 7:26 AM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: Re: [AFMUG] can light wavelength be altered passively? Nothing that I am aware of. Lots of ways to filter and split, but the only way I know of to change frequency of light involves relative motion between the emitter and the receiver. Mark > On Feb 21, 2022, at 1:49 AM, Steve Jones <thatoneguyst...@gmail.com> wrote: > > is there such a thing as a filter that could passively alter a light wavelength? some magic prism? > > like 1391 goes into the magic, non powered box gets touched in its no no square and comes out 1591? > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
