This page contains information on operating the semi-conductor laser set-up in H040.

General information

The set-up consists of light-tight enclosure with a moveable X-Y stage for the Device Under Test (DUT). The three lasers are small diode lasers with a wavelength of 660, 980 or 1060 nm and a maximum output power of about 1 mW. The output of the laser is guided via an optical fibre and focuser (spot size 9 um) to a movable Z-stage.

Laser Safety

All three lasers are class IIIb lasers which means that directly looking into the laser beam can lead to permanent damage of the retina. Quoting Wikipedia: A Class 3B laser is hazardous if the eye is exposed directly, but diffuse reflections such as from paper or other matte surfaces are not harmful. Continuous lasers in the wavelength range from 315 nm to far infrared are limited to 0.5 W. For pulsed lasers between 400 and 700 nm, the limit is 30 mW. Other limits apply to other wavelengths and to ultrashort pulsed lasers. Protective eyewear is typically required where direct viewing of a class 3B laser beam may occur. Class-3B lasers must be equipped with a key switch and a safety interlock.

Our set-up is protected with an interlock on the door of the enclosure which switches off the electrical signal (pulse) to the laser driver. Laser glasses are available available in case you must work with the laser on while the door is open (bypassing the interlock). This is however only allowed after consulting a permanent staff member of the R&D group. Note that different laser safety glasses are needed for the different laser wavelengths: red light: 660 nm or infrared light: 980 and 1060 nm

Movable stages

Details about lasers

660 nm laser

  • laser_spec_660nm.jpg:
    laser_spec_660nm.jpg

980 nm laser

  • laser_spec_980nm.jpg:
    laser_spec_980nm.jpg

1060 nm laser

  • laser_spec_1060nm.jpg:
    laser_spec_1060nm.jpg

-- MartinVanBeuzekom - 2012-03-09

Topic attachments
I Attachment Action Size Date Who Comment
PDFpdf DY3.pdf manage 104.5 K 2011-11-15 - 17:42 MartinVanBeuzekom  
PDFpdf FG1.pdf manage 96.9 K 2011-11-15 - 17:50 MartinVanBeuzekom  
PDFpdf collimators_focusers.pdf manage 413.8 K 2012-03-12 - 15:19 MartinVanBeuzekom  
JPEGjpg laser_spec_1060nm.jpg manage 360.3 K 2012-03-09 - 12:55 MartinVanBeuzekom  
JPEGjpg laser_spec_660nm.jpg manage 304.9 K 2012-03-09 - 12:54 MartinVanBeuzekom  
JPEGjpg laser_spec_980nm.jpg manage 425.5 K 2012-03-09 - 12:55 MartinVanBeuzekom  
PDFpdf laser_spotsize_etc.pdf manage 387.0 K 2012-03-12 - 15:19 MartinVanBeuzekom  
Topic revision: r4 - 2012-03-12 - MartinVanBeuzekom
 
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