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FrozenGate by Avery

671 nm diode laser

E

ECDL

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Feb 20, 2020
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Hi,

I am looking for 671nm diode lasers, single transverse and longitudinal modes, with output power of 50mW or more. I could not find anything above 15mW. Are high power 671nm diodes available in the market? I would hugely appreciate if someone could help...

By the way, I know that 100mW laser diodes are available at 660nm but that won't serve my purpose. I need 671nm... Thanks.
 





Not that I am aware of. I assume you plan to use the diodes for Lithium laser cooling. If so there is a way to get the 100mW at 660nm to work at 671nm in an ECDL.

Singlemode
 
If you want a specific, uncommon laser wavelength be prepared to spend some money.

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Singlemode Laser said:
Not that I am aware of. I assume you plan to use the diodes for Lithium laser cooling. If so there is a way to get the 100mW at 660nm to work at 671nm in an ECDL.

Singlemode
Click to expand...

Correct, I need these diode for Lithium laser cooling! I know that 660nm diodes can be heated to make them operate at 671nm in an ECDL but at 60-70C, the temperature stability is a big issue and the diodes fail quite frequently due to the heat. Do you know of a better or more robust way?
 
ECDL said:
Correct, I need these diode for Lithium laser cooling! I know that 660nm diodes can be heated to make them operate at 671nm in an ECDL but at 60-70C, the temperature stability is a big issue and the diodes fail quite frequently due to the heat. Do you know of a better or more robust way?
Click to expand...


There is no need to heat them so strong. You can get wavelength selected 660nm diodes that lase close to 665nm and can be pulled in an ECDL up to 667nm or so. Than 10°C rise will give you 3nm higher wavelength so you should easily be able to run your ECDL at 40°C. This is a temperature that can be handled easily.

I assume you would need more power anyway, so my solution would be a low power ECDL (Ar coated if possible) and a tapered amplifier that will give you 500mW.

Singlemode
 
Singlemode Laser said:
There is no need to heat them so strong. You can get wavelength selected 660nm diodes that lase close to 665nm and can be pulled in an ECDL up to 667nm or so. Than 10°C rise will give you 3nm higher wavelength so you should easily be able to run your ECDL at 40°C. This is a temperature that can be handled easily.

I assume you would need more power anyway, so my solution would be a low power ECDL (Ar coated if possible) and a tapered amplifier that will give you 500mW.

Singlemode
Click to expand...

I tried wavelength selecting last time, could not get anything beyond 663nm. Do you have a specific recommendation regarding the source?

AR coated diodes are dirty expensive. Tapered Amplifier also expensive. I want to avoid these. I would rather make a 5mW 671nm ECDL and injection lock another non-AR coated diode to it - that is only if I could find a suitable ~100mW diode at 671nm.
 
ECDL said:
I tried wavelength selecting last time, could not get anything beyond 663nm. Do you have a specific recommendation regarding the source?

AR coated diodes are dirty expensive. Tapered Amplifier also expensive. I want to avoid these. I would rather make a 5mW 671nm ECDL and injection lock another non-AR coated diode to it - that is only if I could find a suitable ~100mW diode at 671nm.
Click to expand...


Try this guy:

This diode from sharp : GH06P25A1C
has a wavelenght spread through the batches up to 670nm. If you contact sharp, they can select the ones you looking for.

he always helped me so far to get diodes on the edge of the datasheet (he takes 50$ for selection). Ar coated diodes are not as expensive as you think (1.4k for 671nm). Believe me, I have ore than 10years experience with diode lasers for atomic physics experiments and if you can get a tapered amplifier for 2-3 that will give you 500mW of power it is much better than injection locking, believe me (really).

If you project does not have the money, ypu have to bite into the sour apple and heat the 660nm diodes to 671nm.

Singlemode
 
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Looking at the divergence of this diode and knowing what they were made for, CDROM's, I'm guessing this must be a single mode diode which can produce up to 100 mw at 671 nm if the temperature is somewhere around 65 degrees C? This diode is rated to run up to 85 C.




With this diode having an operating temperature up to +85, it should be better than trying to push that other diode so hot which is limited to 60 degrees C. Even better, I know where you can get them at a very low price, I have lots.
 
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