Alan Stummer
Research Lab Technologist


LµM, Laser Microwave Modulator

Warning:  This is a work in progress.  Take everything with a grain of salt!

I am curious who uses what.  Are these webpages a waste of time, or are they any help to others?  Are the circuits, software and utilities appearing in other labs?  Please send your comments or suggestions or what you have used (or not) or schematics of your version or pictures or anything!   Email me, or be creative and send a postcard! I want to hear from the vacuum! Links

NOTICE: This webpage and associated files are provided for reference only.  This is not a kit site!  It is a collection of my work here at the University of Toronto in the Physics department. If you are considering using any schematics, designs, or anything else from here then be warned that you had better know something of what you are about to do.  No design is guaranteed in any way, including workable schematic, board layout, HDL code, embedded software, user software, component selection, documentation, webpages, or anything.

All that said, if it says here it works then for me it worked. To make the project work may have involved undocumented additions, changes, deletions, tweaks, tunings, alterations, modifications, adjustments, waving of a wand while wearing a pointy black hat, appeals to electron deities and just plain doing whatever it takes to make the project work.


Started Oct 2012 for Ramon Ramos in Aephraim's labs.  Puts sidetones on a laser at 6.818GHz, about 20% AM.  A laser is run at few tens of mA.  A VCO set for 6.818GHz is attenuated then coupled to the laser with a bias-tee.  The depth of modulation is manually set by the adjustable attenuator.

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