YCOB Nonlinear Crystal
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Ships from:
China
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On FindLight:
since 2019
Description
YCOB (YCa₄O(BO₃)₃) is a high-performance nonlinear optical crystal widely recognized for its excellent potential in ultraviolet (UV) and blue-green wavelength frequency multiplication. Comparable in nonlinear optical coefficient to BBO and LBO crystals, YCOB offers effective second and third harmonic generation (SHG and THG) capabilities, achieving up to 2.8× and 1.4× the conversion efficiency of KDP, respectively. Its advantages include large aperture size, high laser-induced damage threshold (2000–2500 GW/cm² in the femtosecond regime), broad angular and temperature acceptance, small dispersion, and short growth cycle using the Czochralski method.
YCOB’s stable physical and chemical characteristics (non-deliquescent) and excellent machinability make it highly reliable in demanding laser systems. It has been successfully demonstrated in generating 2.35 W CW green output at 532 nm from Nd:YVO₄ lasers and in THG at 355 nm for high-power pulsed systems. These attributes position YCOB as a preferred material for SHG, THG, OPO, OPA, OPCPA, and other nonlinear optical applications, especially in high-power and ultrafast laser systems.
YCOB Nonlinear Crystal
Specifications |
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|---|---|
| Crystal Type: | BBO (Beta Barium Borate) |
| Phase Mathcing Type: | Not Applicable |
| Mounting: | Unmounted |
| Width: | 18 mm |
| Height: | 18 mm |
| Length: | 2 mm |
| Flatness: | <= Lambda/10 |
| Surface Quality (Scratch-Dig): | 20-10 |
| Thermal Conductivity: | 2.6 W/m/K (||X), 2.33 W/m/K (||Y), 3.1 W/m/K (||Z) |
| Deff (SHG, Type I, 1.0642µm ⇒0.5321µm): | 0.39 θ =90˚,Φ=35.3˚ (XY plane) |
| Deff (SHG, Type I, 1.0642µm ⇒0.5321µm): | 0.78 θ =31.7˚,Φ=0˚ (XZ plane) |
| Deff (SHG, Type I, 1.0642µm ⇒0.5321µm): | 1.36 θ =148.3˚,Φ=0˚ (XZ plane) |
| Deff (SHG, Type I, 1.0642µm ⇒0.5321µm): | 1.14 θ =65˚,Φ=36.5˚ |
Features
- High Electric Resistivity: Ensures minimal energy loss and efficient optical performance.
- High Temperature Acceptance: Capable of operating under high-temperature conditions without degradation.
- High Laser-Induced Damage Threshold: Withstands high power laser operations, making it suitable for intense applications.
- Less Anisotropy: Provides uniform optical properties in different directions, enhancing performance consistency.
- Small Thermal Expansion Coefficient: Maintains structural integrity and optical performance over varying temperatures.
- Less Parametric Luminescence: Reduces undesired luminescent effects, improving signal clarity.
- SHG (Second-Harmonic Generation) & THG (Third-Harmonic Generation): Efficiently converts laser frequencies for various optical applications.
- OPO (Optical Parametric Oscillator): Utilized in generating tunable laser outputs across a wide spectrum.
- OPA (Optical Parametric Amplification): Amplifies optical signals for enhanced output power.
- OPCPA (Optical Parametric Chirped-Pulse Amplification): Delivers high-energy pulses with precise control for advanced applications.
- Piezoelectric Acceleration Sensors: Suitable for use in sensors due to its piezoelectric properties.
Applications
- Second-Harmonic Generation (SHG): Efficient doubling of fundamental laser wavelengths.
- Third-Harmonic Generation (THG): Produces UV wavelengths from visible laser sources.
- Optical Parametric Oscillation (OPO): Tunable wavelength generation for spectroscopy and sensing.
- Optical Parametric Amplification (OPA): Boosts weak optical signals for ultrafast applications.
- Optical Parametric Chirped-Pulse Amplification (OPCPA): Delivers few-cycle pulses with high peak power.
- Piezoelectric Acceleration Sensors: Utilizes piezoelectric properties for precision measurement.
Frequently Asked Questions
YCOB crystal has several advantages such as large aperture, high damage intensity in femtosecond regime, wide allowable Angle range and allowable temperature range, small dispersion Angle, shorter growth period by Cz method, stable physical and chemical properties, and good machining properties.
YCOB crystal has several applications such as SHG (second-harmonic generation), THG (third-harmonic generation), OPO (optical parametric oscillator), OPA (optical parametric amplification), OPCPA (optical parametric chirped-pulse amplification), piezoelectric acceleration sensors, pressure sensors, and gas sensors.
The effective frequency multiplication coefficients of the second and third order reach 2, 8 and 1, 4 times of KDP respectively.
One of the latest technical achievements connected with YCOB crystal is the generation of 2.35-W CW green output (λ = 532 nm) in a 1.2-cm-long crystal via inter cavity SHG of a diode-array end-pumped Nd:YVO4 laser. Another similar application is THG of NdYVO4 laser radiation.
YCOB (YCa4O(BO3)3, Yttrium Calcium Oxyborate) is a nonlinear crystal that is considered to have good prospects of UV band optical frequency multiplier.