case positive 445

[justin lawson]

__________________
several 650nm keychain pointers, line generators and levels
2 8mW UniPhase HeNe 633nm
200mW unknown mfg 532nm
150mW Optotronics 532nm
150mW laseryork module 532nm
40mW Optotronics 532nm
5mW POS Ebay 532nm
>1.0W Yobresal 445nm
4 Ebay 405nm pens overspec
LaserBee II OTW


cool pics:gj:

 

[Gryphon]

^ how did you post nothing :thinking:

 

[midias]

^ how did you post nothing :thinking:

This was the post

__________________
several 650nm keychain pointers, line generators and levels
2 8mW UniPhase HeNe 633nm
200mW unknown mfg 532nm
150mW Optotronics 532nm
150mW laseryork module 532nm
40mW Optotronics 532nm
5mW POS Ebay 532nm
>1.0W Yobresal 445nm
4 Ebay 405nm pens overspec
LaserBee II OTW


cool pics:gj:

 

[Benm]

200mA to just lase the diode ? Dang, pretty inefficient at low power.

I'd say its fairly typical for a laser diode though. The theshold current often about 1/5th of the maximum operating current. This holds true for both dvd writer diodes and these 445 nm ones.

This makes it difficult to create a low power laser with a high power diode, since you need a current just above the treshold. The problem is that the threshold depends on temperature, and as a result the output power would greatly change with even small temperature fluctuations.

 

[Gryphon]

This was the post

No, everything that falls bellow the solid line is his signature, above that line is what gets posted. In his post its blank.

 

[midias]

No, everything that falls bellow the solid line is his signature, above that line is what gets posted. In his post its blank.

Odd because when I hit the quote button it picked up his signature

 

[Gryphon]

your right, i just pressed the quote button and everything does get copied :thinking:

 

[Kevlar]

I'd say its fairly typical for a laser diode though. The theshold current often about 1/5th of the maximum operating current. This holds true for both dvd writer diodes and these 445 nm ones.

Sorry for the threadjack but this is a very usefull piece of information. Does this hold true for the 405nm diodes as well?