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SPECTRA OF NIR LASERS


This web page will be for nothing but spectra of lasers.
Ocean Optics USB2000 Spectrometer donated by P.L.
As of 10-10-07, I've been using a PC2000-ISA Spectrometer from Ocean Optics that I received several years ago, but that I didn't have a home for until now.
As of 03-08-08, I once again have the USB2000 spectrometer, enabling color spectra again.





LASERS (or "LAZERS" if you prefer to be incorrect):


Spectrographic analysis
Spectrographic analysis of the 490nm line from the 980nm Laser Pen.



Spectrographic analysis
Spectrographic analysis of the 490nm line from the 980nm Laser Pen; spectrometer's response narrowed to a band between 475nm and 505nm to pinpoint emission, which consists of two lines at 489.060nm and 491.50nm.

The raw spectrometer data (tab-delimited that can be loaded into Excel) is at http://ledmuseum.candlepower.us/47/980.txt


Spectrographic analysis
Spectrographic analysis of the LZIR808-200 808nm Infrared Invisible Burning Portable Laser; newest (01-13-13) spectrometer software settings used. Spectrometer's response narrowed to a band between 800nm and 810nm to pinpoint wavelength, which is 806.040nm.

The raw spectrometer data (tab-delimited that can be loaded into Excel) is at http://ledmuseum.candlepower.us/43/ir-200.txt


Spectrographic analysis
Spectrographic analysis of the LZGN-808-500 808nm 500mW Focusable Infrared Laser; newest (01-13-13) spectrometer software settings used. Spectrometer's response narrowed to a band between 805nm and 810nm to pinpoint wavelength, which is 806.040nm.

The raw spectrometer data (tab-delimited that can be loaded into Excel) is at http://ledmuseum.candlepower.us/43/ir-500.txt


Spectrographic analysis
Spectrographic analysis of the 300mW 780nm Diode Laser Module; newest (03-25-12) spectrometer software settings used.


Spectrographic analysis
Spectrographic analysis of the 300mW 780nm Diode Laser Module; newest (03-25-12) spectrometer software settings used. Spectrometer's response narrowed to a band between 780nm and 790nm to pinpoint wavelength, which is nm.
As you can see, this laser's wavelenth is 785.777nm.


Spectrographic analysis
Spectrographic analysis of the LZGN-808-500 808nm 500mW Focusable Infrared Laser just above lasing threshold.
Spectrometer's response narrowed to a band between 806nm and 812nm.


Spectrographic analysis
Spectrographic analysis of the LZGN-808-500 808nm 500mW Focusable Infrared Laser well below lasing threshold.
Spectrometer's response restricted to a band between 760nm and 840nm.


Spectrographic analysis
Spectrographic analysis of the LZGN-808-500 808nm 500mW Focusable Infrared Laser after intentional ignorance of the duty cycle recommendation to check for wavelength drift -- which was indeed found -- but it drifted shorter this time.

Spectrometer's response narrowed to a band between 800nm and 820nm.


Spectrographic analysis
Spectrographic analysis of the LZGN-808-500 808nm 500mW Focusable Infrared Laser after intentional ignorance of the duty cycle recommendation; spectrometer's response narrowed to a band between 806nm and 812nm.

This now shows that the wavelength has shortened to 808.480nm and the spectral line halfwidth is ~2.960nm (whereas these values were 810.30nm and the spectral line halfwidth was ~3.60nm when last measured).


Spectrographic analysis
Spectrographic analysis of the LZGN-808-500 808nm 500mW Focusable Infrared Laser after inadvertant ignorance of the duty cycle recommendation to check for wavelength drift -- which was indeed found.

Spectrometer's response narrowed to a band between 800nm and 820nm.

This shows that the wavelength has lengthened to 810.30nm and the spectral line halfwidth is ~3.60nm (whereas these values were 807.95nm and ~3.80nm when new).


Spectrographic analysis
Spectrographic analysis of the LZGN-808-500 808nm 500mW Focusable Infrared Laser.
Wavelength appears to be ~808nm, which is ***WELL*** within specification for the type of laser diode used in this laser.


Spectrographic analysis
Spectrographic analysis of the LZGN-808-500 808nm 500mW Focusable Infrared Laser; but spectrometer's response narrowed to a band between 800nm and 820nm.
This shows that the wavelength is in fact 807.95nm and the spectral line halfwidth is ~3.80nm.


Spectrographic analysis
Spectrographic analysis of the LZIR808-200 808nm Infrared Invisible Burning Laser Module after three minutes of continuous operation.
This shows that the wavelength is now 807.91nm and the spectral line halfwidth is ~2.30nm.


Spectrographic analysis
Spectrographic analysis of the LZIR808-200 808nm Infrared Invisible Burning Laser Module.
Wavelength appears to be ~808nm, which is ***WELL*** within specification for the type of laser diode used in this laser.


Spectrographic analysis
Spectrographic analysis of the LZIR808-200 808nm Infrared Invisible Burning Laser Module; but spectrometer's response narrowed to a band between 800nm and 820nm.
This shows that the wavelength is in fact 806.01nm and the spectral line halfwidth is ~3.30nm.


Spectrographic analysis
Spectrographic analysis of the Roithner Lasertechnik # TEL-2E20-007 VCSEL.


Spectrographic analysis
Spectrographic analysis of the 50W 808nm Laser Diode Module; newer spectrometer software & settings used.
Below lasing threshold; I do not yet have a power supply that can deliver sufficient current to bring it to threshold.


Spectrographic analysis
Spectrographic analysis of the 300mW 780nm Diode Laser Module.


Spectrographic analysis
Spectrographic analysis of the 300mW 780nm Diode Laser Module; spectrometer's response narrowed to a range of 770nm to 790nm.
As you can see, this laser's peak output is at 785.1nm.


Spectrographic analysis
Spectrographic analysis of a 50W 808nm Diode Laser Module,
operating ***BELOW*** lasing threshold.
















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