Rayscience C00126 External-Cavity High-Power Helium-Neon Laser
| Brand | Rayscience |
|---|---|
| Model | C00126 |
| Output Power (Nominal) | ≥10 mW to ≥95 mW (depending on tube length) |
| Discharge Tube Length | 400 mm to 2000 mm |
| Transverse Mode | TEM₀₀ |
| Long-Term Power Stability | ≤±1.5 %/hour (after 2 hrs warm-up) |
| Short-Term Power Stability | ≤±2.5 %/hour (within first hour) |
| Warm-up Performance | ≥70 % nominal output at power-on |
| Free Spectral Range (FSR) | 65 MHz to 300 MHz |
| Polarization Ratio | 1000:1 (vertical or horizontal) |
| Beam Diameter | 0.7 mm to 2.0 mm |
| Beam Divergence | ≤0.5 mrad to ≤1.0 mrad |
| Operating Current | 8–15 mA |
| Power Supply Consumption | 50 W to 100 W |
| Dimensions (L×W×H) | 560×115×90 mm to 2185×120×95 mm |
| Weight | 5 kg to 20 kg |
| Lifetime | ≥10,000 hours |
| Mounting Dimensions (A) | 390 mm to 1400 mm |
| Mounting Dimension (B) | 64 mm |
| Mounting Dimension (C) | 64 ±4 mm (adjustable) |
| Power Supply Size | 240×240×90 mm |
| Power Supply Weight | 3 kg |
Overview
The Rayscience C00126 External-Cavity High-Power Helium-Neon Laser is a precision-engineered continuous-wave (CW) gas laser system designed for demanding metrology, interferometry, holography, and alignment applications requiring long-term amplitude stability, single longitudinal mode (SLM) capability, and high polarization purity. Unlike internal-cavity HeNe lasers, the C00126 employs a mechanically stabilized external resonator configuration—where the plasma tube is decoupled from the optical cavity mirrors—enabling superior thermal management and reduced sensitivity to mechanical drift. The laser operates at the standard 632.8 nm red emission line with fundamental TEM00 spatial mode output, ensuring diffraction-limited beam quality essential for wavefront-sensitive instrumentation.
Key Features
- Thermally Stable Mechanical Architecture: Constructed with low-expansion alloy steel cavity mounts and an insulated aluminum housing, the system minimizes thermally induced cavity misalignment. This design maintains consistent mirror spacing and angular orientation, directly contributing to the specified ≤±1.5 %/hour power stability after 2-hour thermal equilibrium.
- Hermetic Optical Sealing: All optical interfaces—including Brewster windows, high-reflection (HR), and output coupler (OC) mirrors—are sealed using molded, aging-resistant silicone elastomer gaskets. These compression-fit seals prevent dust ingress and moisture condensation on critical optical surfaces, preserving transmission efficiency and mitigating long-term power degradation.
- Dual-Stage Mirror Adjustment: Precision differential micrometer screws enable independent coarse (0.75 mm pitch, wide-range locking) and fine (0.05 mm pitch, low-sensitivity tuning) alignment of both HR and OC mirrors. The three-point kinematic mount between fixed and movable cavity plates eliminates relative slippage under vibration or transport, ensuring operational robustness in laboratory and industrial environments.
- Regulated Switch-Mode Power Supply: Integrated compact switching power supply delivers stable discharge current (8–15 mA depending on tube length) with active thermal management via internal cooling fans. Rated for continuous 24/7 operation, the supply exhibits low ripple and fast transient response, supporting rapid warm-up and consistent plasma ignition.
- ESD-Safe Enclosure: Fully grounded metallic chassis eliminates electrostatic buildup—verified by absence of perceptible static discharge upon operator contact—ensuring safe handling in electrostatic-sensitive environments such as cleanrooms and semiconductor fabrication labs.
Sample Compatibility & Compliance
The C00126 series is compatible with standard optical tables, kinematic mounts, and beam delivery components used in ISO/IEC 17025-accredited calibration laboratories. Its TEM00 output and polarization ratio of 1000:1 meet requirements for applications governed by ISO 10110-2 (optical component surface imperfections), ISO 11146 (laser beam parameters), and ANSI Z136.1 (laser safety). While not certified to IEC 61000-6-3 (EMC) or FDA 21 CFR Part 1040.10 (laser product classification) out-of-the-box, the system complies with Class 3R laser safety limits per IEC 60825-1 when operated within specified power ranges and equipped with appropriate interlocks. Documentation supports traceable calibration protocols aligned with NIST-traceable reference standards.
Software & Data Management
The C00126 is a standalone analog laser source with no embedded firmware or digital interface. However, its stable output enables seamless integration into automated measurement systems via external photodiode monitoring and feedback loops. Users routinely pair it with data acquisition hardware (e.g., National Instruments DAQ modules) and software platforms including LabVIEW, MATLAB, or Python-based control suites for real-time power logging, thermal drift analysis, and long-term stability reporting. Audit trails for operational parameters—including runtime hours, warm-up profiles, and ambient temperature correlation—can be generated in compliance with GLP/GMP documentation practices when interfaced with validated SCADA or LIMS environments.
Applications
- High-resolution laser interferometry (e.g., Michelson, Twyman-Green, and Fizeau configurations)
- Gravitational wave detector prototype alignment and path-length stabilization
- Calibration of position-sensitive detectors (PSDs), quadrant photodiodes, and autocollimators
- Holographic recording requiring coherence lengths exceeding 20 cm
- Optical encoder and scale calibration in coordinate measuring machines (CMMs)
- Fundamental physics experiments involving Doppler-free saturation spectroscopy
- Teaching laboratories for quantum optics and laser physics curricula
FAQ
What is the typical coherence length of the C00126 laser?
Coherence length is inversely proportional to the laser’s longitudinal mode linewidth and free spectral range (FSR). With FSR values ranging from 65 MHz to 300 MHz across models, and assuming single-longitudinal-mode operation, coherence lengths typically exceed 0.5 m (for 2000-mm tube) to >3 m (for 400-mm tube), subject to environmental vibration and temperature control.
Is the output polarization direction fixed or user-selectable?
The polarization orientation (vertical or horizontal) is factory-set per unit and maintained by the Brewster-angle geometry of the plasma tube. It is not user-reconfigurable without disassembly and realignment, which voids warranty and calibration validity.
Can the laser be operated in pulsed mode?
No—the C00126 is strictly a CW device. It lacks Q-switching or modulation electronics. Analog intensity modulation up to ~10 kHz is possible via external acousto-optic modulators (AOMs) placed in the beam path.
What maintenance is required during its 10,000-hour lifetime?
No scheduled maintenance is required. Periodic visual inspection of ventilation grilles and cleaning of external optics (using certified lens tissue and reagent-grade acetone) are recommended. Internal optical alignment is factory-sealed and should not be adjusted in-field.
Does the power supply support universal AC input (100–240 VAC)?
Yes—the integrated switch-mode power supply accepts 100–240 VAC, 50/60 Hz input, with automatic range selection. Input voltage and frequency are marked on the rear panel label per IEC 60950-1 compliance.
