Computer Program Detail Page

Item Picture
written by Dr. Enrique Galvez
This is a Matlab program to generate a forked diffraction pattern that produces Laguerre-Gauss (LG) beams. Its primary use is for loading it onto a spatial light modulator (Cambridge correlators). The program can produce a phase blaze as well as a binary grating. The phase blaze is for improving the diffraction efficiency. A binary-grating pattern could be printed and the negative of a black & white photograph of it could become a passive diffraction grating.  

Other parameters that can be varied are:
-the line density of the pattern, which controls the diffraction angle,
-the topological charge "l" of the fork, which ends up generating an LG beam with topological charge on first-order diffraction. In LG beams the phase varies with angle, so "l" is the number of times that the phase changes by 2-pi per turn around the center of the beam. The center of the beam has an optical vortex. For more information see: E.J. Galvez, Am. J. Phys. 74, 355-361 (2006).
-an option for amplitude modulation, which generates a purer spatial mode
-an option to correct when the SLM does not vary from 0 to 2-pi in phase encoding.

This program will be referred to in an upcoming article in the Am. J. Phys. on a new undergraduate lab on Poincare beams, which first generate LG beams.
2 supplemental documents are available
Subjects Levels Resource Types
Optics
- Diffraction
- Modern Optics
- Graduate/Professional
- Upper Undergraduate
- Lower Undergraduate
- Instructional Material
= Laboratory
- Tool
= Software
Intended Users Formats Ratings
- Educators
- Learners
- Researchers
- application/matlab
- application/pdf
  • Currently 0.0/5

Want to rate this material?
Login here!


Access Rights:
Free access
License:
This material is released into the Public Domain. No restrictions for non-commercial purposes.
Rights Holder:
Enrique Galvez
Type:
Matlab program
Keywords:
Diffraction grating, Laguerre-Gauss beams
Record Creator:
Metadata instance created March 2, 2016 by Enrique Galvez
Record Updated:
March 16, 2016 by Bruce Mason
Other Collections:

ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
E. Galvez, Computer Program FORKED DIFFRACTION PATTERN, Version 1.0 (2016), WWW Document, (http://departments.colgate.edu/physics/gpl.htm).
AJP/PRST-PER
E. Galvez, Computer Program FORKED DIFFRACTION PATTERN, Version 1.0 (2016), <http://departments.colgate.edu/physics/gpl.htm>.
APA Format
Galvez, E. (2016). Forked diffraction pattern (Version 1.0) [Computer software]. Retrieved December 11, 2024, from http://departments.colgate.edu/physics/gpl.htm
Chicago Format
Galvez, Enrique. "Forked diffraction pattern." Version 1.0. http://departments.colgate.edu/physics/gpl.htm (accessed 11 December 2024).
MLA Format
Galvez, Enrique. Forked diffraction pattern. Vers. 1.0. Computer software. 2016. Matlab program. 11 Dec. 2024 <http://departments.colgate.edu/physics/gpl.htm>.
BibTeX Export Format
@misc{ Author = "Enrique Galvez", Title = {Forked diffraction pattern}, Year = {2016} }
Refer Export Format

%A Enrique Galvez %T Forked diffraction pattern %D 2016 %U http://departments.colgate.edu/physics/gpl.htm %O 1.0 %O Matlab program %O application/matlab %O Matlab program

EndNote Export Format

%0 Computer Program %A Galvez, Enrique %D 2016 %T Forked diffraction pattern %7 1.0 %9 Matlab program %U http://departments.colgate.edu/physics/gpl.htm


Disclaimer: ComPADRE offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure. Please refer to the style manuals in the Citation Source Information area for clarifications.

Citation Source Information

The AIP Style presented is based on information from the AIP Style Manual.

The APA Style presented is based on information from APA Style.org: Electronic References.

The Chicago Style presented is based on information from Examples of Chicago-Style Documentation.

The MLA Style presented is based on information from the MLA FAQ.

Save to my folders

Contribute

Similar Materials