YCOB (Yttrium calcium borate) – Laser Crystal – Nonlinear Crystal – Customized Products

Product ID: 6706

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YCOB (Yttrium calcium borate, YCa4O(BO3)3) – Laser Crystal – Nonlinear Crystal – Customized Products

Yttrium calcium borate, YCa4O(BO3)3(YCOB) crystal, is a nonlinear crystal. Its nonlinear optical coefficient is comparable to that of BBO and LBO crystals, and has stable physical and chemical properties (non-deliquescence) and good machinability.

It can be obtained in a short period by the pulling method. It has become one of the most widely studied nonlinear optical crystals. YCOB crystal has these advantages:

Easy growth of large single crystal with high optical quality
Wide light transmission band
Large phase-matching range
High damage threshold and no deliquescence

It has become a research hotspot of frequency conversion devices. Since Y can be replaced with rare earth-active ions in any ratio, the crystal has both laser and nonlinear optical properties and becomes a laser self-frequency doubling crystal. The biggest advantage of YCOB crystal is its excellent nonlinear optical absorption and can prepare large-diameter devices.

Note:
$100 is a deposit, not the final price of the product. Please contact us for price if needed.

Features of YCOB crystal:
High resistivity
The anisotropy is small
Small coefficient of thermal expansion
High-temperature acceptability
Less parameter luminescence
The laser-induced damage threshold is high

Physicochemical Properties

Crystal Structure Monoclinic, Point Groupm
Lattice Constant a=8.0770 Å, b=16.0194 Å , c=3.5308 Å ,  β=101.167º, Z=2
Melting Point About1510ºC
Mohs Hardness 6~6.5
Density 3.31 g/cm3
Thermal Conductivity 2.6 W/m/K (||X), 2.33 W/m/K (||Y), 3.1 W/m/K (||Z)

 

Experimental Values ​​of Effective Second-order Nonlinear Optical Effects in YCOB Crystals (SHG, type I, 1.0642µm→0.5321µm)

Phase Matching Direction deff [pm/V]
θ =90˚,Φ=35.3˚ (XY plane) 0.39
θ =90˚,Φ=35˚ (XY plane) 0.42
θ =31.7˚,Φ=0˚ (XZ plane) 0.78
1.03
θ =148.3˚,Φ=0˚ (XZ plane) 1.36
1.44
θ =65˚,Φ=36.5˚ 1.14
θ =65.9˚,Φ=36.5˚ 0.91
θ =66.3˚,Φ=143.5˚ 1.45
θ =67˚,Φ=143.5˚ 1.73
θ =66˚,Φ=145˚ 1.8
In YCOB crystals, the properties of DEFF include reflectors and inversion symmetry. This means that the spatial distribution of DEFF can be completely described by selecting two independent quadrants, such as (0° < θ < 90°, 0° < φ < 90°) and (0° < θ < 90°, 90° < φ < 180°). Thereafter, the DEFF value in each of the two quadrants in the (θ, φ) direction is equal to the DEFF value in the (180°-θ, 180°- φ) direction, and vice versa. For example, directions (θ = 33°, ϕ = 9°) and (θ = 147°, φ = 171°) have equal DEFF values.

 

Experimental Values ​​of SHG and SFG Interior Angle Bandwidths of YCOB Principal Planes

Interaction Wavelength Φpm [deg] θpm [deg] Δϕint[deg] Δθint[deg]
XY plane, θ =90◦
          SHG, o+o ⇒ e
1.0642⇒0.5321 35 0.09
         SHG, e+o ⇒ e
1.0642⇒0.5321 73.4 0.32
          SFG, o+o ⇒ e
1.0642+0.5321⇒0.3547 73.2 0.11
YZ plane, φ =90◦
          SHG, e+o ⇒ o
1.0642⇒0.5321 58.7 0.74
          SFG, e+e ⇒ o
1.0642+0.5321⇒0.3547 58.7 0.19
XZ plane, Φ=0◦,θ<vZ</v
           SHG, o+o ⇒ e
1.0642⇒0.5321 31.7 0.08

 

Phase Matching Angle Experimental Value (T=293K)

Interaction Wavelength[µm] Φexp[deg]
XY plane, θ=90˚
SHG, o+o → e
1064 → 532 35
738 → 369 77.3
SHG, type Ⅰ, along Y
724 → 362 90
SFG, o+o → e
1064+532 → 355 75.2
SHG, type Ⅱ, along Y
1030 → 515 90
SFG, e+o → e
1908+1064 → 683 81.2

 

Spectrum


TaorLab laser crystals

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