Powerful and precise multi-color lasers now fit on a single chip

Re:Powerful and precise multi-color lasers now fit on a sing... by danw1979 on Wednesday October 29, 2025 @05:18AM (#45744464)

How would you modulate the individual wavelengths, considering they all come from the same source ?

I had, maybe naively assumed that laser diodes were switched on/off electronically to modulate a signal. With this laser you’d have to modulate after the light source somehow ?

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Re:Powerful and precise multi-color lasers now fit on a sing... by khalic on Wednesday October 29, 2025 @05:48AM (#45744634)

You can always filter the frequencies you don’t need

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Re:Powerful and precise multi-color lasers now fit on a sing... by jagged-chisel on Wednesday October 29, 2025 @05:54AM (#45744687)

The question remains: how to modulate individual wavelengths.

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Re:Powerful and precise multi-color lasers now fit on a sing... by bartlettD on Wednesday October 29, 2025 @07:20AM (#45745340)

Likely some kind of Electro-Optic Modulator. You could use their wavelength comb to separate the light and then use a Mach–Zehnder interferometer to perform On-Off-Keying as an example

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Re:Powerful and precise multi-color lasers now fit on a sing... by IAmBroom on Wednesday October 29, 2025 @01:41PM (#45750369)

There are no "individual wavelengths", ever, anywhere.

Do you mean modulating multiple bands of light, as a TV does with broad-bands of R, G, & B? Do you mean time-band modulation of a single band, like radios do with AM?

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