Research Lab Technologist
Modifications to the LDTC2/2 (2006)
Modifications to the LTDC1020 (2014)
How to Set Up
NOTICE: This webpage and associated files is 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.
The tapered amplifier is an assembly based around the Eagleyard Photonics model EYP-TPA-0780-1000 (or file directly from Eagleyard) GaAs device. The original unit was from 2006 using the LTDC2/2 unit, the second unit was made in 2014 with the newer LDTC1020 unit.
The tapered amp is driven up to 2.0A only in CC (Constant Current) mode, with a 2.5A TEC (ThermoElectric Cooler) to maintain temperature. From Wavelength Electronics , the LDTC2/2 module (2006 version) or the LTDC1020 (2014 version) combines a laser driver module and a TEC controller module on one PCB. The full blown version was used, which includes two heatsinks and fans plus all cables and mounts. A ten-turn pot sets the current, subject to the LDTC2/2 set current limit. A Martel model QM-140V panel voltmeter is set to display the current.
|Sorry, no more chance for asking direct questions, queries, broken links, problems, flak, slings, arrows, kudos, criticism, comments, brickbats, corrections or suggestions.|