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The_LED_Museum said:
I don't believe the same mechanism is responsible for both phenomenon. I could be wrong here, but I don't think so.
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Some diode lasers that are used in DWDM networks are tuned thermally. The wavelength of diode lasers does walk around a little bit over temperature, and in some cases this is exploited as a useful characteristic, allowing several LDs to be tuned slightly apart from each other and then combined onto the same F/O strand.
The fixed-wavelength lasers that are used in fiber optics are held at a given temp by a Peltier junction TEC cooler so they'll stay in the center of their window. I think this is one of the reasons why the greenie pointers change their brightness over temperature drift - the pump diode is drifting in wavelength. So I'm guessing that the physics behind the blue-to-UV shift in the blue LEDs is related to the wavelength drift in laser diodes.
Thinking about it more, I suspect that this is a different mechanism from the EL panels, so you're probably right, Craig.