42. Dr. Anderson states that when he returned to the
University of Colorado, he was unable to pursue the fabrication
of a phase mask because he lacked the equipment and knew of no
person there who could make a phase mask (AR 292, 1 10-11).
43. Dr. Erdogan states that during most of 1992, his
laboratory did not have a phase mask suitable for making Bragg
gratings in optical fibers (AR 284-285, 1 17).
44. Dr. Erdogan further states that he and Dr. Mizrahi
researched several methods for making a phase mask.
45. Anderson directs us to the following activities
regarding Drs. Mizrahi and Erdogan's research for making a phase
mask (Paper at 72, Table 2):
a) on 19 November 1992, Dr. Mizrahi modified his
optical system to accept substrates coated with
material suggested by Tim Weidman and exposed the
coated substrates (AR 273, 1 30).
b) on 20 November 1992 and on 23 November 1992,
Dr. Mizrahi exposed planar substrates in an attempt to
make a phase mask (AR 273-274, IT 31-32).
c) on 21 December 1992, Dr. Erdogan attempted to make a
phase mask by patterning a chromium film that was
deposited on a silica substrate and impinging a pattern
of laser light on the film (AR 285-286, 1 19).
d) on 7 January 1993, Dr. Erdogan used a two beam
interferometer to write gratings in samples of Tim
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