Chirped Volume Bragg Gratings

Chirped Volume Bragg Gratings OptiGrate
  • SW11878
Wavelength 600-2500 nm; Bandwidth 0.2-100 nm; Diffraction Efficiency 5-99%; Thickness Up to 50... more
Product information "Chirped Volume Bragg Gratings"

Wavelength 600-2500 nm; Bandwidth 0.2-100 nm; Diffraction Efficiency 5-99%; Thickness Up to 50 mm; Aperture Up to 20x20 mm

OptiGrate’s chirped volume Bragg gratings (CBGs) are diffractive optical elements operating as reflecting Bragg gratings with a period gradually varying along direction of beam propagation. This feature results in reflection of different wavelengths from different holographically recorded planes inside the grating.

OptiGrate’s BragGrate™ Pulse is the first commercially available Chirped Bragg Grating (CBG) based product designed for the stretching and compression of ultra-short (femtosecond and picosecond) laser pulses in Chirped Pulse Amplification (CPA) and other Ultra-Short Pulse Laser (USPL) systems. It is the most compact and robust stretcher/compressor solution for high-energy and high-average-power ultra-short pulsed laser systems.

The BragGrate™ Tuner is a reflecting volume Bragg grating with chirped period in one direction across its aperture, recorded in a bulk of photosensitive silicate glass. BragGrate™ Tuners can be used as an output coupler or HR mirror in a laser resonator. It enables both spectral stabilization and tuning of the laser radiation. High laser damage threshold makes these gratings suitable for usage in high-power and high-energy pulsed lasers. Tunable lasers based on these components are simple, compact, and robust. Simple linear translation of grating without angular adjustment is needed for wavelength tuning. Lasers with BragGrate™ Tuners can operate in selective laser melting (SLM) regime.

Key Features:

  • Compact Geometry and Easy-to-align
  • Ideal for Industrial and Scientific Applications
  • High-power Operation: Up to 1 kW Average Power
  • High-energy Operation: Up to 2 mJ Pulse Energy
  • Environmentally Stable
  • Robust, Easy to Handle and Clean
  • Multiplexed Gratings for Idle/Signal Control (BragGrate™ Tuner)
  • Stretcher and Compressor in One Element
  • Operating Range: 600 nm to 2500 nm
  • Typical Center Wavelength: 1030 nm
  • Spectral Bandwidth: 0.2 nm to 100 nm; 50 GHz to 500 GHz
  • Typical Spectral Bandwidth for 1030 nm Spectral Range: 5 nm to 25 nm
  • Tuning Range: >20 nm; 1 nm to 30 nm
  • Chirp: Linear Across Full Aperture
  • High Operation Temperatures
  • Continuous Tuning, No Mode-hops
  • Wide-range SF Tuning
  • Compact/Simple Cavity Design
  • Thickness: Up to 50 mm
  • Typical Thickness for 1030 nm Spectral Range: 20 mm to 45 mm
  • Stretching Time (FWHM): Up to 0.5 ns
  • Efficiency: 5% to 99%
  • Typical Diffraction Efficiency for 1030 nm Spectral Range: >85%
  • Apertures: Up to 20 x 20 mm²
  • M2: <1.3
  • Typical Stretching Time (FWHM) for 1030 nm Spectral Range: ~ 300 ps
  • Typical Dispersion Rate for 1030 nm Spectral Range: ~ 6, 12, 25, 60 ps/nm (Linear)
  • Typical Compressed Pulse Duration for 1030 nm Spectral Range: <200 fs

Applications: Stretcher and Compressor for Ultra-short Pulse and Chirped-pulse Amplification (CPA) Laser Systems; Industrial; Scientific; Tunable Output Coupler; Tunable Total Mirror; Tunable Filter; Spectral Beam Combination

Product Group: Chirped Volume Bragg Gratings
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