PowerLocker® Wavelength Stabilization Gratings
Ondax’s PowerLocker® wavelength stabilization gratings are volume holographic gratings (VHGs) that “lock” a laser diode’s emission wavelength into a narrowed optical spectrum. This increases the spectral brightness and delivers highly stablized optical performance over extended temperature ranges. PowerLockers® typically reduce the spectral output of a laser by an order of magnitude. The short external cavity configurations enabled by the PowerLocker® design deliver better mode selection than systems based on Littrow or Littman cavities, at a fraction of the size and cost.
All Ondax VHGs are bulk “solid-state” diffractive holographic filters made from a proprietary photosensitive optical glass, which unlike thin films or gels, can deliver ultra-stable, degradation free performance over an unlimited lifetime. Capable of very tight wavelength, efficiency, bandwidth, and diffraction angle control, Ondax VHGs can be precisely and reproducibly engineered to meet even the most demanding spectral and temporal specifications.
Proprietary materials, manufacturing and test processes ensure consistent, repeatable performance from every single filter, every time, guaranteed.
Features
Increases spectral brightness of lasers
Reduces thermal dependence of lasers
Reduces unwanted spectral components
Ultra-narrow bandwidth
Low loss
Highly stable and reliable
Over 30,000 hours of testing at >200°C
No degradation under high power illumination conditions
Applications
Wavelength Stabilization of Diode Lasers for Optical Pumping and Instrumentation
Notch and ASE Filters for Raman Spectroscopy
Beam Combining
Rb/Atomic Laser pumping
Pulse Stretching and Compression
LIDAR
Augmented Reality (AR)
Metrology
Sensing
Bio-instrumentation
Lung Imaging
| Parameter | Min | Typical | Max | Unit |
|---|---|---|---|---|
| Center Wavelength | 375 | 405, 658, 780.25, 785, 794.7, 808, 885, 920, 938, 976, 981, 1064, 1532, C-band | 2700+ | nm |
| Wavelength Tolerance1 | -0.5 | +0.5 | nm | |
| Wavelength Variation (within filter) | 0.2 | nm | ||
| Bandwidth2 (FWHM) | 0.03 | 1 | nm | |
| Temperature Dependence | 0.01 | nm/˚C | ||
| Bragg Mirror Reflectivity | 5 | 10-98 | >99.9 | % |
| Reflectivity Tolerance1 | -5 | +5 | % | |
| Grating Slant Angle | <1 (Custom Available) | degs | ||
| Standard Dimensions (X,Y) | 0.5 | 25 | mm | |
| Thickness | 0.3 | 0.6-3 | 30 | mm |
Laser Wavelength Stabilization with PowerLocker®
Adding PowerLocker® to an external cavity laser system enables wavelength stabilization of the output, increasing the power in the desired mode and reducing unwanted spectral components.
Unstabilized without PowerLocker®
Wavelength Stabilized with PowerLocker®
Measured Performance with and without PowerLocker®
Model Number System
