Chiron Pockels Cells
The Chiron Pockels cell series are designed for high power and high repetition frequencies of up to 1 MHz at a low operating voltage. In addition, these Pockels cells operate in the 200–1650 nm wavelength range with active apertures of up to 7 mm.
Full Product Description- Optical material:
- BBO
- Wavelength:
- 200-1650 nm
- Contrast Ratio:
- >5000:1
- Active Aperture:
- 9.25–19.5 mm
- Repetition Rate:
- 1 MHz
- Single Pass Distortion:
- <λ/6 @ 1064 nm
- DC quarter-wave voltage:
- 2.0–4.7 kV @ 1064 nm
Product description
Each Chiron Pockels cell utilizes a Beta Barium Borate (BBO) crystal, a high temperature growth material that exhibits > 98% transmission in the UV to NIR wavelength range. Possessing low piezoelectric coupling coefficients, BBO allows the Chiron Pockels cell to operate at high repetition rates up to 1 MHz with no piezoelectric ringing. Further, by taking advantage of the dual crystal geometry of BBO, the Chiron series have a reduced driving quarter wave voltage while maintaining a voltage contrast ratio greater than 1000:1 at 1064 nm.
The Chiron series is ideal for high average power systems due to low absorption that results in reduced thermal lensing and reduced depolarization. Low absorption is achieved with superior crystal quality and we can accomplish this by utilizing proprietary techniques for crystal growing, fabrication, and polishing techniques to provide reliable, high performing Pockels cells.
Options
- Triple BBO crystal for reduced DC quarter wave voltage available
- Conventional threaded connectors
Applications
- Q-switching
- Regenerative amplification
- High pulse repetition rate micro-machining lasers
- High-average power lasers (material processing, metal annealing)
- Medical devices (e.g. ophthalmology)
- Military defense
Key features
- High pulse rate operation up to 1 MHz
- Intrinsic contrast ratio >1000:1
- Voltage contrast ratio >1000:1
- Low acoustic noise
- Reduced DC quarter wave voltage from dual crystal geometry
Specifications
| Name | Value |
|---|---|
| Optical material | BBO |
| Wavelength | 200-1650 nm |
| Contrast Ratio | >5000:1 |
| Active Aperture | 9.25–19.5 mm |
| Repetition Rate | 1 MHz |
| Single pass insertion loss | <1.5%@1064 nm |
| Voltage contrast ratio (VCR) | >1000:1 @ 1064 nm (parallel polarizers) |
| Single Pass Distortion | <λ/6 @ 1064 nm |
| Capacitance (DC) | 4 pF |
| DC quarter-wave voltage | 2.0–4.7 kV @ 1064 nm |
| Rise time | ~ 1 ns (10-90% rise time (theoretical) into 50 Ω line) |
| LIDT | > 10 J/cm² (1064 nm, 10 ns pulse, 10 Hz, 1 mm diameter) |
| Operating temperature | 15°–35° C |
| Storage temperature | -55°–85° C |
| Humidity | Non-condensing environment |
| Duty cycle | <20% |
NOTE: All Specifications above are "Typical Performance" values.
| Typical specifications | Chiron 2.6 | Chiron 3 | Chiron 4 | Chiron 5 | Chiron 7 |
|---|---|---|---|---|---|
| PHYSICAL | |||||
| Hard aperture diameter | 2.6 mm | 3.25 mm | 4 mm | 5.5 mm | 7 mm |
| ELECTRICAL | |||||
| DC quarter wave voltage @ 1064 nm | 2.0 kV | 2.3 kV | 3.0 kV | 3.7 kV | 4.7 kV |
