Dear Dennis... analogZONE's Dennis Feucht answers your design queries in his new Circuit Design Clinic! November 2006

analogZONE presents a new, interactive analog design service to readers! Send us your design questions (with relevant data; schematics in JPEG or GIF, please) for some free engineering advice from analogZONE's circuit consultant, Dennis Feucht, on how you might solve a design problem or improve circuit performance. Submissions may be edited for clarity or brevity, and submitters and their email addresses will remain anonymous (unless otherwise indicated). Please send your questions to Dennis here.

Mixed-Technology Laser System, Part 4

The June 2006 installment covered some problems with a medical laser design. September 2006 addressed more of the feedback loop design, and October 2006 looked at dynamic compensation.

Problem:

The previous article in this series began investigation of the problem of Nd YAG laser power control for a
5 W fs output.

Solution:

In this fourth part, the design of the whole laser loop is completed, beginning with the dynamics.

Read the entire solution here (388 kb Adobe Acrobat PDF file)