LASER CRYSTALS
AND COMPONENTS
|
- POLYUS Research &
Development Institute
has 30-years experience in development and production of
crystals and components for laser industry.
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-
 | Nd:YAG
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| Cr4+:YAG
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| Cr,
Tm, Ho:YAG
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| Er:YAP
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| Ti:
Saphire
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|
-
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- Nd:YAG Rod
Standard Specifications
Nd:YAG Rods for CW Operation
- Material Parameters
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-
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- Orientation
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- [100] within 1 degree
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-
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- Depart Level
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- 0.6...0.8% at. Nd
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- Sizes
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-
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- Diameter
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- 4 mm; 5 mm; 6,3 mm
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-
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- Length
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- 100 mm; 130 mm
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-
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- Dimensional Tolerances:
- diameter
- length
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± 0.1 mm
± 0.5 mm
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- End Configuration
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-
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- Flat-Flat Geometry with AR
Coatings
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-
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-
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- Flatness
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- 1/10 wave
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-
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- Parallelism
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- within 10 seconds of arc
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-
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- Perpendicularity
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- within 1 minute of arc
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-
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- Scratch-Dig
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- 10-5 MIL-O-13830A
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-
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- Reflectivity (at 1.4 - 1.5 µm)
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- less than 0.2%
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-
Nd:YAG Rods for Pulsed Operation
- Material Parameters
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-
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- Orientation
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- [100] within 1 degree
|
-
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- Depart Level
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- 1.0% at. Nd
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- Sizes
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-
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- Diameter
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- 5 mm; 6,3 mm; 8 mm
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-
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- Length
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- 50 mm; 100 mm
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-
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- Dimensional Tolerances:
- diameter
- length
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± 0.1 mm
± 1.0 mm
|
- End Configuration
|
-
|
- Flat-Flat Geometry with AR
Coatings
|
-
|
-
|
- Flatness
|
- 1/10 wave
|
-
|
- Parallelism
|
- within 10 seconds of arc
|
-
|
- Perpendicularity
|
- within 1 minute of arc
|
-
|
- Scratch-Dig
|
- 10-5 MIL-O-13830A
|
-
|
- Reflectivity (at 1.06 and 1.3
µm)
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- less than 0.2%
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Cr4+:YAG
Crystals
- Cr4+:YAG crystal
is a material that can be used as an active media for CW,
pulsed or self mode-locked tunable near IR solid-state lasers
with tunability range of 1.34... 1.58 µm as well as a media
for Q-switching in lasers with operating wavelength at
0.95...1.1 µm.
|
- Cr4+:YAG Crystals
Properties
- Mechanical Properties
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-
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- Mohs Hardness
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- 8.5
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-
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- Thermal Conductivity
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- 12 W K m-1
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-
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- dn/dt
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- 8 10-6 K-1
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- Spectral Properties
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-
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- Operating Transition
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- 3A2
- 3T2
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-
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- Absorption Band
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- 900 - 1150 nm
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-
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- Emission Band
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- 1340 - 1580 nm
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-
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- Dopant Level
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- 1017 - 1018
cm3
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-
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- Damage Threshold (1064 nm, 10
ns)
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- 500 MW/cm2
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-
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- Upper Level Lifetime
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- 3,6 ms (300 K)
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-
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- Quantum Yield
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- 12% (300 K)
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-
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- Absorption Cross Section
(1064 nm)
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- 5 10-18 cm2
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-
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- Emission Cross Section (1420
nm)
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- 4.5 10-19 cm2
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- Cr4+:YAG Crystal for
CW Operation
- Material Parameters
|
-
|
- Orientation
|
- [100] within 1 degree
|
-
|
- Absorption at 1064 nm
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- 1 cm-1; 2.2 cm-1
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- Sizes
|
-
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- Diameter
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- 3 mm; 5 mm;
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-
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- Length
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- 20 mm; 10 mm
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-
|
- Dimensional Tolerances:
- diameter
- length
|
± 0.1 mm
± 0.5 mm
|
- End Configuration
|
-
|
- Two configurations are
available:
- Flat-Flat Geometry with AR Coatings
- Brewster-Brewster Geometry without Coatings
|
-
|
-
|
- Flatness
|
- 1/10 wave
|
-
|
- Parallelism
|
- within 10 seconds of arc
|
-
|
- Perpendicularity
|
- within 1 minute of arc
|
-
|
- Scratch-Dig
|
- 10-5 MIL-O-13830A
|
-
|
- Reflectivity (at 1.06 and 1.3
µm)
|
- less than 0.2%
|
- Cr4+:YAG Crystal for
Pulsed Operation
- Material Parameters
|
-
|
- Orientation
|
- [100] within 1 degree
|
-
|
- Absorption at 1064 nm
|
- 1 cm-1; 2.2 cm-1
|
- Sizes
|
-
|
- Diameter
|
- 3 mm; 5 mm;
|
-
|
- Length
|
- 20 mm; 10 mm
|
-
|
- Dimensional Tolerances:
- diameter
- length
|
± 0.1 mm
± 0.5 mm
|
- End Configuration
|
-
|
- Two configurations are
available:
- Flat-Flat Geometry with AR Coatings
- Brewster-Brewster Geometry without Coatings
|
-
|
-
|
- Flatness
|
- 1/10 wave
|
-
|
- Parallelism
|
- within 10 seconds of arc
|
-
|
- Perpendicularity
|
- within 1 minute of arc
|
-
|
- Scratch-Dig
|
- 10-5 MIL-O-13830A
|
-
|
- Reflectivity (at 1.06 and 1.3
µm)
|
- less than 0.2%
|
- Cr4+:YAG Passive
Q-Switch
- Features:
| high
damage threshold
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| high
contrast
|
| low
losses
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| wide
spectral range
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| small
sizes
|
| X-ray
insensitive
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| wide
temperature range of -60 to +600 °C
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- Specifications
- Wavelength
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- 950 - 1100 nm
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- Initial Transmittance
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- 15...90%
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- Initial Absorption
coefficient
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- 0.05...3 cm-1
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- Aperture
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- 5...12 mm
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- Contrast
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- more than 8...10
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- Optical Length
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- 1...40 mm
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- Damage Threshold
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- more than 4 J/cm2
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- Long-term Stability
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- more than 15 years
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- Specification can be optimized
under customer requirements.
- Cr, Tm, Ho:YAG
Crystals
- Specifications
- Wavelength
|
- 2.08 µm
|
- Dopants
|
- Cr, Tm, Ho
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- Sizes:
- diameter
- length
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5; 6.3; 8 mm
50; 80; 100 mm
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- Efficiency (*)
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- more than 3%
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- Threshold
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- less than 20 J
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- Output Energy (*)
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- more than 2 J
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- AR Coatings
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- less than 0.2 %
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- Note: crystal of dia.5 x 100 mm, Xe
flash lamp pumped of 100 J, 250 µs, output coupler of 7%
- Er:YAP Crystals
- YAlO3
- perovskite (YAP) is well-known host for solid-state laser
application. It has excellent general physical parameters
closed to YAG crystal and it can be useful in the same
applications as YAG.
Using Er:YAP crystal for eye-safe lasers
with operation at 1660 nm is not usual, because of a necessity
to avoid solarization effects under UV flash-lamp radiation.
Co-doping Er:YAP with other dopants gives an opportunity to
prevent the coloration under the flash-lamp radiation and get
high laser efficiency at 1660 nm in eye-safe spectral region.
Er:YAP crystal is a promising material for
eye-safe lasers capable of Q-switched operation with high
repetition rate at 1660 nm
|
- STRUCTURAL AND THERMAL
PROPERTIES
- Density
|
- 5.35 g cm-3
|
- Lattice constant
|
- a = 5.176 A
b = 5.307 A
c = 7.355 A
|
- Thermal expansion coefficient
|
- 9.5 10-6 K-1
along a-axis
4.3 10-6 K-1 along b-axis
10.8 10-6 K-1 along c-axis
|
- Thermal conductivity
|
- 0.11 W cm-1 K-1
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- Knopp hardness
|
- 977 kg mm-2 along
a-axis
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- Optical range
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- 220...6500 nm
|
- Refractive index
|
- na = 1.929
nb = 1.943
nc = 1.952
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- Temperature coefficient of
refractive index
|
- dna / dt = 9.7 10-6
K-1
dnc / dt = 14.5 10-6 K-1
|
- Lifetime of 4S3/2
state
|
- 130 µs
|
Ti:Saphire
Crystals
Specifications
- Tuning Range
|
- 680...1100 nm
|
- Pumping Range
|
- 450...532 nm
|
- Absorption Coefficient at 510
nm
|
- 0.5...2.5 cm-1
|
- FOM
|
- more than 200
|
- Orientation
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- 90° to c-axis
|
- Geometry
|
- flat/flat or
Brewster/Brewster
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- Broadband AR Coatings
|
- less than 0.2 %
|
- Ce:Lu2SiO5
Polished Crystals
- POLYUS Research &
Development Institute offers a new material for X-ray and
g-ray counters. The Ce:Lu2SiO5 crystals
may be used for viewing UV radiation.
|
- Features:
| Size
of 10 x 10 x 10 mm3
|
| Scintillation
efficiency of Ce:Lu2SiO5 crystals is no less
than 70% compared with NaJ(TI)excited by g-ray radiation with energy
of 1MeV
|
| Response
speed is about 15 ns
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