Co Spinel Passive Q-Switch Crystal
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Ships from:
China
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On FindLight:
since 2019
Description
Cobalt-doped magnesium aluminate spinel, commonly referred to as Co:Spinel, is a sophisticated material utilized as a saturable absorber for passive Q-switching in solid-state lasers. This advanced material is engineered to operate efficiently at the eye-safe wavelength of 1.5 µm, making it ideal for applications such as telemetry. The Co:Spinel's unique absorption spectrum, characterized by a broad band in the 1200–1600 nm range, indicates that Co²⁺ ions replace the tetrahedrally coordinated Mg²⁺ ions within the MgAl₂O₄ lattice. This substitution is pivotal in facilitating passive Q-switching, a technique favored for its ability to produce compact and cost-effective laser sources capable of generating nano and sub-nanosecond pulses.
The 1.5 µm wavelength emitted by lasers using Co:Spinel is particularly appealing for various industrial applications. This is primarily due to its eye-safety, high atmospheric transparency, and compatibility with fused-silica waveguides. Additionally, the availability of sensitive room-temperature light detectors, such as Ge and InGaAs photodiodes, further enhances its utility. These attributes make 1.5 µm lasers highly suitable for use in range-finding, environmental sensing, telecommunications, and even medical procedures like surgery.
The absorption peak of Co:Spinel at approximately 1520 nm aligns closely with the most frequently utilized wavelengths in eye-safe laser technology. Co:Spinel is recognized for several intrinsic properties that enhance its performance as a saturable absorber. It boasts a high absorption cross-section, particularly at 1520 nm, and a long excited lifetime, ensuring consistent and reliable operation. The cobalt ions are evenly distributed throughout the material, contributing to a wide absorption band that supports ultra-compact pulsed diode-pumped laser systems. These features underscore Co:Spinel's role as a vital component in modern laser technology, offering significant advantages in both performance and safety.
Co Spinel Passive Q-Switch Crystal
Specifications |
|
|---|---|
| Type Of Crystal: | TeO2 |
| Crystal Diameter: | 6 mm |
| Crystal Length: | 6 mm |
| AR Coating: | Both sides |
| Chemical Formula: | Co2+:MgAl2O4 |
| Refractive Index: | n=1.6948 @1.54 μm |
| Thermal Conductivity/(W·cm-1·K-1@25°C): | 0.033 |
| Thermal Expansion /（10-6 /°C@25°C ）: | 1.046 |
| Concentrations: | (0.05~0.35) wt% |
| Absorption Coefficient: | 0 ～ 7 cm-1 |
| Working Wavelength: | 1200 – 1600 nm |
| Orientation: | [100] or [111] < ±0.5° |
Features
- Eye-Safe Wavelength: Co:Spinel saturable absorbers are ideal for passive Q-switching of solid-state lasers operating at the eye-safe wavelength of 1.5 µm.
- High Peak Power: Enables the generation of short nanosecond pulses with high peak power, perfect for telemetry applications.
- Broad Absorption Spectrum: Co2+-doped MgAl2O4 exhibits a broad absorption band in the 1200–1600 nm range, substituting Co2+ ions for Mg2+ ions in the lattice.
- Compact and Cost-Effective: Passive Q-switching with solid-state saturable absorbers allows for the development of compact, low-cost laser sources.
- Versatile Applications: Suitable for range-finding, environmental sensing, telecommunications, and surgical applications due to high transparency and availability of sensitive detectors.
- Absorption Peak: The absorption peak at 1520 nm is widely used in eye-safe lasers, with significant absorption cross-sections at 1520 nm and 1331 nm.
- High Q-Switch Constant: Features a high constant of Q-switch, enhancing laser performance.
- Wide Absorption Band: Offers a wide absorption band, ensuring effective performance across various applications.
- Ultra-Compact Pulsed Laser: Supports ultra-compact pulsed diode-pumped lasers with applications in lidar and range measurement.
- Even Cobalt Distribution: Ensures evenly distributed cobalt for consistent performance.
Applications
- Range Finding: Utilizes the Co:Spinel for generating short nanosecond pulses at an eye-safe wavelength, making it ideal for range-finding applications.
- Environmental Sensing: The high transparency in the atmosphere and the eye-safe wavelength make it suitable for various environmental sensing tasks.
- Telecommunications: The availability of sensitive room temperature light detectors (Ge and InGaAs photodiodes) enhances its application in telecommunications.
- Surgery: Eye-safe lasers at 1.5µm are advantageous for surgical applications due to their safety and precision.
- Lidar Systems: The 1535nm pulse laser is particularly useful in lidar systems for precise distance measurement and mapping.
- Telemetry: The ability to generate high peak power pulses is perfect for telemetry applications, ensuring accurate data transmission and reception.
Frequently Asked Questions
Lasers emitting at 1.5µm are of great interest for several industrial applications due to their eye-safety, high transparency in atmosphere and fused-silica wave guides, and availability of sensitive room temperature light detectors.
The applications of Co Spinel Passive Q-Switch Crystal include radar and ranging 1535nm laser, medical applications 1500nm laser, and ultra compact pulsed diode pumped laser.
The features of Co Spinel Passive Q-Switch Crystal include rare excited absorption, high constant of Q-switch, high absorption section, long excited lifetime, evenly distributed cobalt, and wide absorption band.
Co Spinel Passive Q-Switch Crystal is used for the passive Q-switching of solid-state lasers operating at eye-safe wavelength of 1.5 μm.
The absorption cross-section of Co Spinel at 1520nm is 3.5×10-19cm2 and at 1331nm is 2.8×10-19cm2.