MgO:LiNbO3 Crystal Description
Pure LiNbO3 (LN) is an ideal choice for various optical devices. MgO: LiNbO3 Crystal has a higher optical damage threshold, which can solve the problem of low threshold damage for pure LiNbO3 crystal. MgO doping has played an important role in LiNbO3 and has shown an increased threshold laser beam strength by 100 times.
MgO:LiNbO3 Description
MgO: LiNbO3 has a similar effective nonlinear coefficient to pure LiNbO3. Its Sellmeier equations (for 5 mol% MgO dopant) are (λ in µm):
no2(λ)=4.8762+0.11554/(λ2-0.04674)-0.033119λ2
ne2(λ)=4.5469+0.094779/(λ2-0.04439)-0.026721λ2
MgO:LiNbO3 Crystal Specification
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Transmitted Wavefront Distortion
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Better than λ/4 @ 633nm
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Dimension Tolerance
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(W±0.1mm) x (H±0.1mm) x (L±0.2mm)
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Clear Aperture
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Over 90% central diameter
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Flatness
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λ/8 @ 633nm
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Surface Quality
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20 /10 Scratch/Dig
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Parallelism
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Better than 20 arc sec
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Perpendicularity
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5 arc min
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Angle Tolerance
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∆q < 0.5°, ∆f < 0.5°
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AR-Coating
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Dual waveband AR coating at 1064/532 nm on
both surfaces, with R < 0.2% at 1064 nm and R <
0.5% at 0.532 nm per surface
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Mg-doped concentration
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0.5~5%
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MgO:LiNbO3 Advantages
- High damage threshold;
- Non-critical phase matching (NCPM) at room temperature;
- Broad transparency range;
- Excellent E-O and NLO properties;
- Good mechanical and chemical properties.
MgO:LiNbO3 Crystal Applications
1. Electro-Optic Modulators:
MgO:LiNbO3 crystals are frequently used in electro-optic modulators. These modulators find applications in telecommunications, optical signal processing, and laser systems.
2. Frequency Doubling (Second-Harmonic Generation, SHG):
These crystals are employed in frequency-doubling processes to generate coherent laser light at exactly half the wavelength of the input laser beam.
3. Optical Parametric Oscillators (OPOs) and Amplifiers (OPAs):
MgO:LiNbO3 crystals can be integrated into optical parametric oscillators and amplifiers for tunable laser output at various wavelengths. These devices are used in spectroscopy, imaging, and scientific research.
4. Acousto-Optic Devices:
Acousto-optic devices, used for modulating and deflecting laser beams, can benefit from the electro-optic properties of MgO:LiNbO3 crystals. These devices find applications in laser beam steering, signal processing, and laser-based measurements.
5. Nonlinear Optical Studies:
In quantum optics experiments, MgO:LiNbO3 crystals can be used to create entangled photon pairs, squeezed states, and other non-classical states of light.
7. Light Modulation and Switching:
The electro-optic properties of MgO:LiNbO3 crystals make them suitable for light modulation and switching applications in telecommunications and optical signal processing.
8. Photonic Integrated Circuits (PICs):
In the development of photonic integrated circuits, MgO:LiNbO3 crystals can serve as key components for light manipulation and signal processing on a chip.
9. Laser Systems:
MgO:LiNbO3 crystals can be integrated into various laser systems, including solid-state lasers and mode-locked lasers, for applications in materials processing, medical technology, and scientific research.
MgO:LiNbO3 Crystal FAQs
Q1What is the transparency range of MgO:LiNbO₃ Crystals?
MgO:LiNbO₃ has a wide transparency range, extending from 0.3 µm to 5.0 µm, covering UV, visible, and infrared wavelengths.
Q2 How does MgO:LiNbO₃ compare to undoped LiNbO₃?
- Photorefractive Resistance: MgO:LiNbO₃ offers significantly improved resistance.
- Damage Threshold: Higher for MgO:LiNbO₃.
- Application Suitability: MgO:LiNbO₃ is preferred for high-power and UV laser applications.
Q3 Can MgO:LiNbO₃ Crystals be used for UV laser applications?
Yes, MgO:LiNbO₃ is highly transparent in the UV range and is suitable for UV laser frequency doubling and other nonlinear optical processes.
