Volume Holographic Bragg Grating Filters
Stabilize and narrow your laser spectrum with VHG or VBG ultra-narrowband filters for diode pumping, spectroscopy, and high-precision instrument applications.
- Stabilized Wavelength Control Lock your pump/diode laser over a broad temperature range.
- Narrow Bandwidth Maximize the performance of spectroscopy systems with improved ASE and Rayleigh rejection.
- Chirped Pulse Amplification Stretch and recompress high power CPA pulses in an ultra-compact footprint.
Unmatched Optical Performance
All Coherent VHG and VBGs 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. They are ideal for ASE elimination, laser wavelength locking, and Rayleigh-blocking in THz-Raman.
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PowerLocker® Gratings Increase the spectral brightness of your laser diode and get highly stabilized optical performance over extended temperature ranges. |
Narrow Bandwidth - Get up to 10X reduction in laser bandwidth. |
Compact and Economical - Smaller and less costly than external cavity setups. |
Thermally Stable - Minimize the temperature dependence of your laser wavelength. |
SureBlock Notch Filters Enable complete material identification by capturing THz-Raman signals that provide structural information in addition to the traditional chemical fingerprint. |
Ultra-Narrow Bandwidth (<10 cm⁻¹) - Acquire ultra low frequency Raman data. |
Exceptional Optical Density with High Transmission - Detect both Stokes and Anti-Stokes Raman signals. |
Wide Selection - Available at all standard Raman wavelengths from 488 to 1064 nm. |
NoiseBlock Filters Suppress the ASE background emission that commonly occurs in laser diodes. Create a pure, ASE-free, narrow-band laser that is ideal for Raman spectroscopy. |
High (>90 %) Efficiency - Brighter lasers and more intense spectral data. |
High SNR Ratio - Narrow Spectral Profile - HWHM<10 cm⁻¹ for optimum Raman resolution. |
Strong (>70 dB) Blocking - Cleaner spectra with lower background noise. |
PicoPulse Filters Use these pulse stretcher/compressor filters to get high peak power in femtosecond pulsed laser systems. Delivers a distortion-free round output beam. |
Free Space Operation - Supports larger beams and higher powers than CFBGs.
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Compact Format - Avoids the size and alignment challenges of grating methods.
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Thermally Invariant - Does not drift with any changes in lab temperature.
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