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Hi, Im trying to understand how to work out the luminance or luminance intensity a laser diode can emit. Most of the maths I've seen when looking around is full of variables I don't understand. Is there a simple way to work out the properties of the light produced using the wavelength, output...

Hi, Im designing a setup to focus the light from a 405nm laser diode into a multimode fiber (50 or 62.5/125), could anyone suggest a lens or lenses to do this? will i need 2 lenses, a collimator lens then a focusing lens or just the one? Thanks

Any ideas where i could get a hold of a 405nm laser diode (anything up to 100mW) with built in photodiode? Ive asked for a couple for quotes and cheapest has been £248 for a single LD, not sure if im asking the wrong people or they really are that pricey. thanks

Hi, Great Forums! Im trying to get a general idea of how the photodiode in laser diodes can be used to regulate the current to the laser diode. What kind of feedback circuitry could be used for this? i understand that the voltage drop across the photodiode is proportional to optical output...