Multi-Stage-Peltier Cooled Red/Orange Laser?

So, i have seen before that by cooling red lasers with liquid nitrogen, you can achieve much shorter wavelengths (down to the 605-610nm region) however you need very, very low temps (like -200C) but what type of results could we get with one of the low power, 635nm single mode diodes (like the HL63603TG) and cooled it with a 4-stage peltier cooler? i think it could get down to -70C if were lucky. what type of wavelength are we looking at for a temp like that?

The general thinking is 1 nm per 10 degrees C below zero, so with a perfect combination of a low bin and perfect temps, about 625nm or so would be the best you could hope for. Keep in mind that red led traffic lights are 625nm.

Chicxulub said:

The general thinking is 1 nm per 10 degrees C below zero, so with a perfect combination of a low bin and perfect temps, about 625nm or so would be the best you could hope for. Keep in mind that red led traffic lights are 625nm.

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So it wouldn't quite be worth it. And thats probably if your lucky, I'm assuming. Although, there is a very noticeable difference between 635-38nm vs 650-60nm, so the extra few nanometres would probably be even orange-er (but not by much I'm guessing).

I'd wager that if it were right next to a 635, you could tell a bit of a difference. But if it were by itself, it would probably just look red. :/