MgO:LiNbO3 Nonlinear Crystal
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China
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On FindLight:
since 2019
Description
MgO-doped LiNbO3 is a groundbreaking advancement in the field of nonlinear optics, designed to optimize the performance of traditional LiNbO3 crystals. One of the principal challenges with standard LiNbO3 is its vulnerability to photorefractive damage, which is an optically induced change in the refractive index, typically occurring under exposure to blue or green continuous-wave light. Historically, to counteract this issue, LiNbO3 crystals were maintained at elevated temperatures of 400K or above. However, the introduction of MgO-doping, particularly at concentrations around 5 mol% for congruent LiNbO3, has significantly mitigated this problem.
MgO doping has revolutionized the use of LiNbO3 in various optical applications by dramatically increasing its threshold for laser beam strength, sometimes by as much as 100 times. This enhancement is particularly evident in stoichiometric LiNbO3 crystals doped with just 1 mol% MgO, which have demonstrated a higher photorefractive damage threshold compared to 5 mol% MgO-doped congruent samples. This improvement in damage resistance is complemented by a lower coercive field value, making MgO-doped LiNbO3 an attractive choice for high-performance optical devices.
The physical properties of MgO-doped LiNbO3 are noteworthy, with significant changes observed in transition temperature, activation energy, optical band, optical absorption spectra, and the shift of OH- vibration frequency. These properties reach a threshold composition at just above 5 mole% of MgO concentration, underscoring the importance of precise doping levels to achieve optimal performance. Furthermore, the density and electric activation energy of MgO:LiNbO3 have been extensively studied, reinforcing its suitability for advanced optical applications.
MgO:LiNbO3 Nonlinear Crystal
Specifications |
|
|---|---|
| Crystal Type: | LiNbO3 (Lithium Niobate) |
| Phase Mathcing Type: | Not Applicable |
| Mounting: | Unmounted |
| Width: | 10 mm |
| Height: | 10 mm |
| Length: | 5 mm |
| Flatness: | <= Lambda/10 |
| Surface Quality (Scratch-Dig): | 20-10 |
| AR Coating: | One side |
Features
- High Homogeneity: Ensures uniformity in crystal performance and quality.
- Wide Transparency Range: Suitable for various optical applications across different wavelengths.
- High Damage Threshold: Enhanced resistance to optical damage, making it ideal for high-power laser applications.
- Good Electro-Optical Properties: Efficient modulation of light based on electric fields.
- Good Photoelastic Properties: Reliable performance in stress-induced birefringence applications.
Applications
- Second Harmonic Generation (SHG): Frequency doubling of laser light for visible output.
- Third Harmonic Generation (THG): Tripling of fundamental laser frequencies for ultraviolet light production.
- Optical Parametric Oscillator (OPO): Tunable coherent light generation across a wide spectral range.
- Optical Parametric Amplification (OPA): Amplification of weak optical signals for enhanced sensitivity.
- Optical Parametric Chirped-Pulse Amplification (OPCPA): High-power ultrafast laser pulse amplification.
- Electro-Optic Modulators: Fast modulation of laser beam phase and intensity in telecommunications and laser systems.
Frequently Asked Questions
MgO:LiNbO3 is used in second-harmonic generation (SHG), third-harmonic generation (THG), optical parametric oscillation (OPO), optical parametric amplification (OPA), optical parametric chirped-pulse amplification (OPCPA), electro-optic modulation, range finders, laser radars, and mobile telephones.
MgO:LiNbO3 has high homogeneity, a wide transparency range, a high damage threshold, good electro-optical properties, and good photoelastic properties.
MgO:LiNbO3 is a type of nonlinear crystal that optimizes the performance of LiNbO3.
MgO doping increases the threshold laser beam strength by 100 times, which helps to deal with the low threshold optical damage of pure LiNbO3.
Every physical property of MgO-doped LN has a threshold composition at just above 5 mole% of MgO concentration.