Development of a passive electrical-to-optical pulse converter for the production of high resolution fiducial signals [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1997.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 12 pages : digital, PDF file
Additional Creators:: Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

Access Online

www.osti.gov

Availability

Finding items...

Restrictions on Access:

Free-to-read Unrestricted online access

Summary:

The analysis of many high explosives (HE) involves the use of rotating-mirror cameras and high speed film. Fiducial timing spots are made on the film to provide temporal reference to the experimenter during subsequent evaluation. The writing speed of the {open_quotes}streak{close_quotes} camera is 10 millimeters per microsecond, thus, the optical fiducial pulse width must be on the order of tens of nanoseconds to generate a useful spot size. For this application, a useful spot size corresponds to a width of 200-300 micrometers. Present systems employ light-emitting diodes for this task, mounting them at the focal point of the camera. However, the size and clarity of the current timing spot on the film is less than optimum. Furthermore, experiments involving high explosives require the isolation of the electronic instrumentation from the experimental hardware and passive operation is always preferred if not required. This is due to safety requirements as well as instrumentation ground loop and EMP concerns. Another restriction is the diminished sensitivity of the high-speed film to wavelengths above 600 manometers, which narrows the field of possible optical sources considerably. A passive, fiber-coupled system based upon a 635 manometer laser diode has been developed and tested. The development process, final design and test results are presented and the improved signal resolution is compared with current technology.

Report Numbers:

E 1.99:la-ur--96-4623
E 1.99: conf-970231--4
conf-970231--4
la-ur--96-4623

Subject(s):

Other Subject(s):

Note:

Published through SciTech Connect.
02/01/1997.
"la-ur--96-4623"
" conf-970231--4"
"DE97001677"
SPIE international symposium, San Jose, CA (United States), 8-14 Feb 1997.
Hall, C.R.; Paul, J.D.; Grant, S.; Mozzano, S.

Funding Information:

W-7405-ENG-36

View MARC record | catkey: 14656417