Spectrum of DPSS green laser

[hamzahumayun]

hi,

İ was trying to measure the power of DPSS green laser using 'ilx lightwave 6810b power meter'.
The problem i am facing is that the wavelength the meter is showing is 790 nm instead of 532nm. İ am confused? Does the laser also emit the 1064nm light too?

Best Regards

Hamza

 

[ARG]

The strongest line is 532nm, there are smaller 808nm lines and 1064nm lines as well.

 

[ultimatekaiser]

Indeed arg is right. The meter is probably is confused on the wavelength due to the laser not having proper filtering possibly.

 

[lazeristasUVISIR]

hi,

İ was trying to measure the power of DPSS green laser using 'ilx lightwave 6810b power meter'.
The problem i am facing is that the wavelength the meter is showing is 790 nm instead of 532nm. İ am confused? Does the laser also emit the 1064nm light too?

Best Regards

Hamza

Have you any IR-cut filter? Or a spectrometer to check for 808 and 1064.

 

[hamzahumayun]

İ measured the spectrum with a spectrometer but there was one one peak around 532 nm. İ will take the spectrum again on monday with a better calibrated spectrometer.

Attaching file of previous spectrum

BR

Hamza

 

[lazeristasUVISIR]

İ will take the spectrum again on monday with a better calibrated spectrometer.

Just measure farther on the IR side - you stopped at 1045,29. Have at least 1070.

808 nm is from a pumping diode, and it is focused on the crystal, then it gets absorbed and whatever is left has a large divergence. Your measurements did not show anything at 808. On the other hand 1064 nm has similar properties, like a direction and beams size, as 532 nm.

I have no experience with your ILX power meter, but mine requires to enter an approximate wavelength value to get a trustworthy measurement. Can you do that with yours?