Ondax’s 785nm Wavelength Stabilized Laser is a single mode, miniature laser in a standard TO package. The stabilization is achieved using the Ondax Volume Holographic Grating (VHG) PowerLocker
.The laser has a very low temperature dependence and precise center wavelength over the locked region.
The narrow linewidth and long coherence length from a standard TO packaged laser enables many applications.

Features :

• Wavelength stabilty (~0.015nm/ºC)
• Single frequency
• Coherence length (>2m)
• Hermetically sealed
• Custom wavelengths available

Applications :

• Raman spectroscopy, flow cytometry, metrology, bio instrumentation, graphic arts, analytical instrumentation, sensing, and data storage.

The Ondax series of Single Frequency Collimated Laser Modules feature wavelengths from 405nm to 808nm with an integrated TEC and driver circuit in a compact, self-contained, and rugged package.
The built-in temperature controller maintains the laser diode temperature within ±0.01ºC resulting in excellent power stability that varies less than 1% over long term.
The wavelength stabilization with the Ondax Volume Holographic Grating (VHG) ®PowerLocker technology guarantees long term wavelength stability.

Features :

• Single frequency
• Compact, rugged package
• Blue, red, and infrared wavelengths
• Custom wavelengths available

Applications :

• Raman spectroscopy, flow cytometry, metrology, Bio Instrumentation, graphic arts, analytical instrumentation, sensing, and data storage.

The Ondax FCLM Series of laser modules provide a very narrow linewidth and long coherence length with a precise center wavelength.
The frequency stabilized, fiber coupled, laser module is stabilized using the Ondax Volume Holographic Grating (VHG) PowerLocker.The unit is remotely controllable via an analog control interface.

Features :

• Single frequency
• High frequency TTL modulation
• SM and MM fiber-coupled
• Compact, rugged package
• Blue, red, and infrared wavelengths
• Custom wavelengths available

Applications :

• Raman spectroscopy, flow cytometry, metrology, bio instrumentation, graphic arts, analytical instrumentation, sensing, and data storage.

Ondax’s SureLock405nm Wavelength Stabilized Laser is a miniature collimated laser.
The stabilization is achieved by optical feedback using the Ondax Volume Holographic Grating (VHG) PowerLocker external to the TO-can package for long lifetime operation.
The VHG ensures a stable single frequency operation.

Features :

• Single frequency, coherence length (~1m)
• Wavelength stability (4pm/ºC)
• Collimated TEM output

Applications :

• Raman spectroscopy, data storage, flow cytometry, metrology/interferometry, embossed holograms, CD mastering, diffraction grating fabrication, confocal microscopy, particle counting, fluorescence, nondestructive testing, microlithography, high speed printing, lidar.

The Ondax NoiseBlock™ ASE Filters suppress the broad spectrum of spontaneous emission from laser diodes which provides a pure, ASE-free, single frequency laser.
The ASE Filter is a reflective volume holographic grating (VHG) with bandwidth of the order of 400 picometers and throughput greater than 90%. The VHG is purposely manufactured with a slant that provides an angular separation between the specular Fresnel reflection from the surface of the VHG and the filtered laser beam (top figure right).
A single frequency wavelength stabilized laser at 785nm is shown in the bottom left figure. The two curves show the laser ASE background with and without the ASE Filter. With the NoiseBlock™ ASE Filter, more than 90% of the single frequency line is conserved while removing at least 40dB of the broad ASE spectral background.
The combination of the SureLock™ wavelength stabilized laser and NoiseBlock™ ASE Filters provides a pure single frequency laser with greater than 80dB suppression ratio.
The ASE background level in the bottom left figure is limited by the measurement capability of the Optical Spectrum Analyzer. Power Handling: the glass material is resistant to average powers in excess of several kW/cm2 at 1064nm and peak power in excess of 170MW/cm2 peak power (fluence of 3.8 J/cm2) at 1064nm.
The NoiseBlock™ ASE Filter is available at custom wavelengths between 400nm and 3,000nm.

Specifications :

• Center wavelength: 400nm to 3000nm
• Efficiency: 0.02nm/mm to 0.05nm/mm
• VHG/ASE size: 1mm to 30mm

Ondax’s 785nm, 600mW Wavelength Stabilized Laser is a multi-mode, miniature laser in a butterfly, fiber-coupled package with integrated TEC.
The stabilization is achieved using the Ondax Volume Holographic Grating (VHG) PowerLocker.
The laser has a very low temperature dependence and precise center wavelength over the locked region.

Features :

• Spectral linewidth (0.15nm)
• Wavelength stability (0.01nm/ºC)
• 100um MM fiber
• Butterfly package
• Custom wavelengths available

Applications :

• Raman spectroscopy, sensing, metrology, medical, graphic arts, military, and analytical instrumentation.

Ondax’s narrow band notch filters are manufactured in a highly reliable holographic glass material.
Optical density from 4 to 6 per filter, transmission > 70%.
Available for standard Raman wavelength : 488, 532, 633, 785 nm (custom wavelengths on demand).
Bandwidth measured from maximum optical density to 50% -1transmission : 10cm.
Enable Stokes and anti-Stokes low-frequency Raman spectrum.
Standard size : 1 inch mount,9.5 mm aperture.

Applications :

• Low-frequency spectrum of Sulfur obtained with Raman system illustrated aboveLow frequency Raman spectroscopy - Life Science, Solid State Physics
• Replace the wide-band notch filters in your Raman system with TMSureBlock notch filters and obtaina high performance system capable of resolving spectral -1Raman shift down to 10 cm

The Ondax VHG pulse stretchers/compressors are based on Bragg diffraction from volume gratings where the grating period varies along the length of the component (so-called chirped grating).
These VHGs replace conventional fiber gratings and diffraction gratings to provide a more compact and robust solution.
The functionality of VHG chirped pulse compression gratings is identical to that of chirped Fiber Bragg Gratings (FBG) with the important addition that the power handling of VHG chirped gratings is many orders of magnitude higher because of the free space operation allowing a large input beam size.
Ondax has patented a method that eliminates the spatial chirp and provides an excellent output beam quality for the stretched/compressed pulse.

Features :

• Output beam quality: circular - no spatial chirp
• Packaged in a housing with mounting holes
• Power handling : up to 1kW average power or up to 1mJ pulse energy in the sub picosecond regime
• Stretching time : typ. 300 ps (up to 600 ps)
• Spectral bandwidth : up to 10 nm with efficiency 80%
• Spectral ripple : <+/- 10%
• Clear aperture : typ. 2 x 5 mm, up to 2 x 12 mmoo
• Performance guaranteed from 10C to 60C

Ondax’s PowerLocker increases the spectral brightness of high power laser diodes and locks their emission wavelength.
The short external cavity enabled TMby the PowerLocker provides better mode selection than systems based on Littrow and Littman cavities.
The PowerLocker is a volume holographic glass grating which reflects a specified wavelength at a given reflectivity.

Features :

• Reduces thermal dependence of lasers
• Increases spectral brightness of lasers
• Locks at one wavelength
• Improves diode yield Stable and reliable
• High damage threshold 2>170MW/cm
• Standard wavelengths : 405, 658, 780.25, 785, 794.7, 808, 920, 938, 976, 981, 1064nm, and C band
• Custom wavelengths : 350nm to 3micron

Applications :

• Diode pumped solid state lasers (DPSSL), Raman spectroscopy, RGB sources, Frequency doubling, Gas sensing, Rangefinding, Rb lasers, Bio instrumentation, Graphic arts (printing and digital imaging), Beam combining, Metrology, etc.