<==== Sam's Laser FAQ ====>

DANGERDANGERDANGERDANGERDANGER

Safety, Info, Links, Parts, Types, Drive, Construction

A Practical Guide to Lasers for Experimenters and Hobbyists
Version 6.70

Copyright © 1994-2004
Samuel M. Goldwasser
--- All Rights Reserved ---

For contact info, please see the Sci.Electronics.Repair FAQ Email Links Page.


Reproduction of this document in whole or in part is permitted if both of the following conditions are satisfied:
  1. This notice is included in its entirety at the beginning.
  2. There is no charge except to cover the costs of copying.


Sam's Laser FAQ Welcome Page

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    Welcome to Sam's Laser FAQ!

    This collection of documents, called "Sam's Laser FAQ", has a great deal of practical information on a variety of laser related topics. If you are already familiar with its scope, purpose, and general organization, you can go directly to Sam's Laser FAQ Table of Contents. However, if this is your first visit - or you have been away for awhile - check out the summary and version update info below.

    Sam's Laser FAQ provides a wealth of useful (not just textbook) information on many types of lasers of interest to the experimenter and hobbyist:

    Sam's Laser FAQ was developed to provide a unique resource for experimenters and hobbyists - as well as just plain old basement tinkerers. To the best of my knowledge, nothing as comprehensive has ever been available anywhere else in the explored universe (and almost certainly beyond) either on-line or in print.

    If this was what you were looking for, your search is over! :-)



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    A Word About These Pages

    Sam's Laser FAQ is declared to be a fluff-free zone! There will be no unnecessary, superfluous, or useless graphics of any kind - including but not limited to: dancing, gyrating, or other animated icons, colored textured backgrounds that are impossible to read through, or forced downloading of bit intense pictures that may be of no interest to you. Nor, will I ever expect you to use a particular brand of Web browser to be able to effectively access these pages. There are and never will be any advertisements, cookies, or other impositions on your time and space. In the time that it may take wading through a single monstrosity of the professional Web page designers at other sites, you will be able to find out what you want to know, when you want to know it! What a concept. :-) (Note, however, that your browser needs to be configured properly to make sense of the many ASCII diagrams, schematics, and tables. See the document: Suggested Browser Settings for font and other related information.)

    In return for this gold mine of information, please make a serious effort to find the answers to your questions before contacting me. It may take just a wee bit of effort and could stress a few neurons in the process, but there is an excellent chance that what you seek is covered here. Should you be really stuck - or just want to discuss lasers, I will respond to email in a timely manner. However, if your questions indicate that you haven't even gotten past the Welcome Page, AND I am in a good mood, you will get a somewhat polite reply to read the appropriate chapter(s) of the FAQ. On the other hand, if it is a bad day, and you are really really lucky, you will probably be ignored. Don't get me wrong - I enjoy discussing lasers with laser enthusiasts and novices alike, and will be happy to do so at almost any hour of the day or night. However, if you're seeking some basic information, I would really really appreciate it if you do at least a bit of your homework first. In any case, if you do email me, I expect to be able to hit the reply key for my mail program and not get bounced email. I will not attempt to unjumble any anti-SPAM email addresses! I have posted over 20,000 articles to the USENET newsgroups using my true email address. And, you won't pick up SPAM via my private email anyhow. Even computer viruses avoid my address book since it's on a unix system!) Yes, SPAM is a pain but I tolerate the small amount I get resulting from postings so others will not be inconvenienced.

    However, due to the increasing amount of SPAM via repairfaq.org email addresses, I have decided to require all initial email contact from the FAQs to be via the Feedback Form on the Sci.Electronics.Repair FAQ Email Links Page. (At some point my repairfaq.org email address will cease to function.) Any reply from me will have a valid email address to use for future correspondance. My apologies but I've already made so many millions from all those get rich quick schemes that I've run out of places to put it all. :)

    Note: I NEVER send email attachments. If you receive a message supposedly from one of my addresses with any sort of attachment, it is bogus and possibly a virus - someone's address book includes my address and their computer is infected. Send me the complete headers and I'll attempt to check it out just hit the delete key.



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    Navigating Sam's Laser FAQ

    Under ideal conditions, the entire 8+ MB text of Sam's Laser FAQ would be in a single file and your access to it would be via a 100 GB/s link. In a few years, such capabilities may appear primitive but for now, one can only dream of avoiding the World Wide Wait. :) Therefore, the organization of these pages ends up being a compromise. If you have the space, installing a local copy of Sam's Laser FAQ on a reasonably fast computer would be best (though you lose out on automatic updates). See: Sam's Laser FAQ Local Installation for details.

    Sam's Laser FAQ is divided into chapters and sections. Except for the introductory material including the Table of Contents (ToC), each chapter is a separate file and has its own Sub-Table of Contents (Sub-ToC) Anything smaller than a chapter is called a section and has its own header and link from the chapter's Sub-ToC. Multiple sections may be grouped where they are related to one topic or related topics. For the most part, there are no nested text files. With one or two possible exceptions, the only files below the text files are those for diagrams and photos. To minimize download time, there are no in-line graphics anywhere except the Laser Equipment Gallery where relaxation is encouraged. :)

    Links to return to the ToC are located at the beginning of every chapter and links to return to its Sub-ToC (top of page) are located at the end of the chapter as well as between major sections. There is also a link at the end of every chapter to the next chapter.

    Hyperlinks within the text will either be to other chapters or sections of Sam's Laser FAQ (in which case they will generally be preceded with "chapter:" or "section:" as appropriate) or to other pages on this Web site or elsewhere. All local links have complete URLs including the filename so it is possible to tell if the link is to some other page (if the filename doesn't match the one currently being read).

    All of Sam's Laser FAQ uses the very simplest HTML. This is partly because I have to maintain it and partly to avoid fluff. :) I have thought about adding a framed entry point which would include the ToC(s) down the left edge and would be interested in any opinions you may have on this and other formatting issues.

    I realize that a fast search facility would be really nice. Eventually, I may have one (I refuse to use free search engines that impose advertising. They tend to be too slow anyhow.) In the meantime, realize that you can always use Ctrl-F in your browser to search any single document. The two special files: Sam's Laser FAQ Expanded ToC and Sam's Laser FAQ Comprehensive Table of Contents provide a means of using this technique to find desired topics with a minimum of effort. You can also use the search engine on the Drexel S.E.R FAQ Mirror Site. However, if someone would offer to provide a fast non-commercial search engine that I can just drop in with near zero effort, please contact me me via the Sci.Electronics.Repair FAQ Email Links Page.



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    Sam's Laser FAQ Sites

    Check out the Home and Mirror Site Locations page for a list of places to find Sam's Laser FAQ (as well as the complete Sci.Electronics.Repair (S.E.R) FAQ and Silicon Sam's Technology Resource (SSTR).

    The mirror sites (no pun intended... OK, well maybe just a little one-sided one) will always maintain a reasonably current version of this document. Check the individual sites for the latest version and specific viewing and download options and try to use the site nearest you to minimize Web traffic!

    There is also an early version (even predates the name "Sam's Laser FAQ") at The Laser Resource Library which is quite ancient (and ugly) at this point. I have no plans to update it mainly because I have lost the password and become disgusted with the annoying advertising imposed by the operators of that site. :-) Or, go to Sam's Laser FAQ Archive for this and a couple other antiques.

    We are always looking for contributions (of all types) in any and all laser related areas to expand the content of these sites.



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    Version Update Information

    While there may be small updates as well as more substantial additions almost daily, when the number of revised and added bits reaches a critical (but random) threshold, an entry is added here to summarize the major enhancements that may be noteworthy.

    What's New as of V6.60

    What's New as of V6.40

    What's New as of V6.25

    What's New as of V6.10

    What's New as of V5.90

    What's New as of V5.60

    What's New as of V5.35

    What's New as of V5.20

    What's New as of V5.00

    What's New as of V4.75

    What's New as of V4.40

    What's New as of V4.25

    What's New as of V4.00



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