Hi,
I was just wondering what the effect of temperature variations would be on a typical laser pointer. I haven't noticed any major variations using my device in hot environments, although I don't have the equipment to measure this accurately.
Obviously, I'd expect increased carrier energies at raised temperatures and therefore, possibly increased leakage currents across the pn junction (thus reducing the available carriers for radiative recombination). I tried thinking about this in terms of the ideal shockley equation, concluding that a greater threshold current would be required at raised temperatures too. From reading around on the web, 'mode hopping' was mentioned as well.
I was just wondering if anyone with more experience in this could comment if the above seems plausible / suggest any other effects please?
Many Thanks,
I was just wondering what the effect of temperature variations would be on a typical laser pointer. I haven't noticed any major variations using my device in hot environments, although I don't have the equipment to measure this accurately.
Obviously, I'd expect increased carrier energies at raised temperatures and therefore, possibly increased leakage currents across the pn junction (thus reducing the available carriers for radiative recombination). I tried thinking about this in terms of the ideal shockley equation, concluding that a greater threshold current would be required at raised temperatures too. From reading around on the web, 'mode hopping' was mentioned as well.
I was just wondering if anyone with more experience in this could comment if the above seems plausible / suggest any other effects please?
Many Thanks,