Linear cavity SHG system (MSL)
(Frequency Conversion)
The MOGLabs MSL linear cavity SHG system allows highly efficient frequency doubling of laser light over a broad wavelength range, including 740/370, 798/399, 922/461, 960/480 and 1020/510nm. Unlike bow-tie ring cavities, the linear design requires no alignment adjustment.
SHG efficiency is typically 80 to 90% for mid-power TA amplified systems (0.5 to 5 watts), and can be optimised for low power direct ECDL (e.g. 100mW) or high power fibre amplified systems.
The cavity is monolithic, with temperature stabilisation and a high bandwidth piezo actuator for locking.
The MSL is available separately as a complete doubling system with input mode matching, HC (or PDH) locking, fibre input and optional fibre output, or combined with the MOGLabs MSA or fibre amplified lasers, to provide stable and robust sources for new wavelengths.
Features
- Alignment-free linear cavity optical design
- Broad wavelength tunability, up to 75nm
- No kinematic mounts: vibration inert
- Hermetically sealed; gas purge optional
- High bandwidth piezo actuator (>30kHz)
- Low amplitude noise
- Self-contained, electronics included
- FM cavity locking built-in
- USB-C interface (provides power) + ethernet
- Precision temperature control
- Wide selection of wavelength bands (e.g. 370nm – 445nm, 445 – 520nm, 510 – 560nm)
- High efficiency, over 80% at 1 watt
- Crystal displacement to increase lifetime
- User-changeable crystal
- Re-usable, re-configurable
- Compatible with MOGLabs LASRACK
Options
- PDH locking
- Hänsch-Couillaud (HC)
- Fibre output
Specifications
System Specifications
| Wavelengths available | 370 to 445nm, 445nm to 510nm, 510nm to 560nm; others on request |
| Wavelength range | Typically ±20nm @ harmonic |
| Coarse tuning (crystal) | Typically ±10nm @ harmonic, larger range available upon request |
| Conversion efficiency | Over 90% demonstrated (1.1 W at 399nm from 1.22 W at 798nm) |
| Continuous piezo scan range | Typically 3 GHz at 399nm |
| Input | FC/APC connector default, free-space on request |
| Output | Free-space or FC/APC connector |
| Beam quality (doubled output) | Near diffraction limited; M² < 1.05 |
| Isolation | Single-stage Faraday isolator |
| Piezo bandwidth | First resonance over 30 kHz |
| Crystal | Non-hygroscopic, system-dependent, user-replaceable |
| Polarisation | Linear > 100:1 |
| Residual infrared | TBD |
| Locking | FM demod or HC or optional PDH using diode modulation or EOM |
| Output power noise | <0.2% rms |
| Dimensions | 300 x 155 x 93 mm (LxWxH); 7kg |
Electronics Specifications
| Control system | Fully self-contained digital controller |
| Communications | USB-C, 10/100 ethernet |
| Piezo control | 150 V, digital + analogue PID servo |
| Locking | FM demod or optional HC, external PDH using diode mod or EOM |
| Software | SCPI-like text-based command interpreter; Windows GUI app |
| Power | USB-C, 3.5 W typica |
MOGLabs 홈페이지
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- Frequency doubling/mixing (MGFM)
