Appeal No. 1997-0030
Application No. 08/180,767
achieves a two stage amplification of the gold laser output as
follows:
The wavelength selective properties of mirror 1
allow transmission of the copper laser output at 511
and 578nm to mirror 2 whilst directing the gold
laser output through the spatial filter 3 and thence
into the transversely pumped dye cell amplifiers 4
and 5. Approximately one third of the copper laser
output is directed by mirror 6 and focussing lens 7
into the dye cell 4. In this way the weak gold
laser radiation at 628nm emitted by the discharge
tube passes through two stages of amplification and
results in a beam of substantial output power which
is frequency locked to the 628nm line. [Page 6,
lines 4-14.]
Thus, Piper teaches seeding a dye laser with a wavelength
produced by a first metal (e.g., gold) while pumping the dye
laser with a wavelength produced by a second metal (e.g.,
copper) to produce an amplified single wavelength output at a
wavelength corresponding to the seed wavelength of the first
metal. Accordingly, it is clear that Piper teaches using only
a single wavelength of a metal vapor laser at the output of
the laser treatment system.
8
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Next
Last modified: November 3, 2007