7G55.10 - Diode Lasers

Code Number:
7G55.10
Demo Title:
Diode Lasers
Condition:
Excellent
Principle:
Wavelengths of Diode Lasers
Area of Study:
Modern Physics
Equipment:
Array of 6 LED lasers.
Procedure:

Adjust the lasers so that they are in a straight vertical line when turned on.  A grating placed in front of the lasers will show how the light is diffracted for each color of laser.  

CAUTION:  The batteries for each of these diode lasers must be inserted in the opposite direction from a flashlight.  In other words, the positive end of the batteries should be at the back cap of the lasers.

References:
  • Abdulaziz M. Aljalal, "Michelson Interferometry With a Diode Laser", AJP, Vol. 90, #5, May 2022, p. 373.
  • Abdulaziz M. Aljalal, "Measuring the Speed of Light Using Optical Feedback from a Picosecond Diode Laser", AJP, Vol. 90, #3, March 2022, p. 211.
  • Robert E. Hebner Jr., J. Daniel Jones, Kaare J. Nygaard, "GaAs Laser Experiments for the Undergraduate Laboratory*", AJP, Vol. 41, #2, Feb. 1973, p. 217.


Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.