Blue diode-pumped solid-state-laser based on ytterbium doped laser crystals operating on the resonance zero-phonon transition

Patent · Mon Jan 01 00:00:00 EST 2001

OSTI ID:874062

Krupke, William F ^[1]; Payne, Stephen A ^[2]; Marshall, Christopher D ^[3]

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1. Pleasanton, CA
2. Castro Valley, CA
3. Livermore, CA

The invention provides an efficient, compact means of generating blue laser light at a wavelength near .about.493+/-3 nm, based on the use of a laser diode-pumped Yb-doped laser crystal emitting on its zero phonon line (ZPL) resonance transition at a wavelength near .about.986+/-6 nm, whose fundamental infrared output radiation is harmonically doubled into the blue spectral region. The invention is applied to the excitation of biofluorescent dyes (in the .about.490-496 nm spectral region) utilized in flow cytometry, immunoassay, DNA sequencing, and other biofluorescence instruments. The preferred host crystals have strong ZPL fluorecence (laser) transitions lying in the spectral range from .about.980 to .about.992 nm (so that when frequency-doubled, they produce output radiation in the spectral range from 490 to 496 nm). Alternate preferred Yb doped tungstate crystals, such as Yb:KY(WO.sub.4).sub.2, may be configured to lase on the resonant ZPL transition near 981 nm (in lieu of the normal 1025 nm transition). The laser light is then doubled in the blue at 490.5 nm.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: The Regents of the University of California (Oakland, CA)
• Patent Number(s): US 6304584
• OSTI ID: 874062
• Country of Publication: United States
• Language: English

Related Subjects

blue
diode-pumped
solid-state-laser
based
ytterbium
doped
laser
crystals
operating
resonance
zero-phonon
transition
provides
efficient
compact
means
generating
light
wavelength
near
about493-3
nm
yb-doped
crystal
emitting
zero
phonon
line
zpl
about986-6
fundamental
infrared
output
radiation
harmonically
doubled
spectral
region
applied
excitation
biofluorescent
dyes
about490-496
utilized
flow
cytometry
immunoassay
dna
sequencing
biofluorescence
instruments
host
strong
fluorecence
transitions
lying
range
about980
about992
frequency-doubled
produce
490
496
alternate
tungstate
ybkywosub4sub2
configured
lase
resonant
981
lieu
normal
1025
4905
laser light
laser diode
fluorescent dye
laser crystal
/372/