Spectroscopy Reference (MGSA)
The MOGLabs MGSA is a compact atomic reference for stabilising tunable lasers. It uses saturated absorption spectroscopy with an alkali cell (Rb, Cs or K) to provide an absolute frequency reference. Beam expansion reduces power broadening so that spectral features approach the natural linewidth. The laser can be fibre-coupled or free-space. A low-noise amplified photodetector is included, with connection compatible with the MOGLabs DLC range of laser controllers. A resonant Zeeman coil allows modulation for AC locking, without modulation of the laser itself.
Features
- - Rb, Cs or K cell
- - Free space or fibre coupled input
- - Low noise amplified photodetector
- - Zeeman modulation for AC locking
- - Direct connection to MOGLabs DLC controllers
Specifications
Atomic References
| Cell type | Borosilicate glass |
|---|---|
| Rb cell | 70mm path length, 22mm OD |
| Cs cell | 20mm path length, 15mm OD |
| K cell | 75mm length, 25mm OD |
Natural isotopic abundance. Isotopically pure fill available as option.
Photodetector
| Photodiodes | Si-PIN, 740 – 1100nm Optional: 400nm – 1100nm or InGaAs |
|---|---|
| Coupling | AC and DC, single or differential |
| Bandwidth | 720 kHz |
| Sensitivity | 15 V for 0.25mW input |
| Connection | 6-pin IEEE-1394, to MOGLabs DLC |
Zeeman Coil
| Modulation | 250kHz, <10mA |
|---|
Dimensions
| Dimensions | 200mm x 86mm x 51mm (LxWxH); 0.7kg |
|---|
Ordering
Free-space: MGSA-zz where zz is Rb, Cs or K
Fibre-coupled: MGSA-zz-APC for FC/APC connection, or MGSA-zz-PC for FC/PC connection.
Typical Configuration
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