ASE Filters and Beam Splitters

Ultra Narrow-band Notch Filters Wavelength-stabilized Laser Sources

Raman signals from < 10 cm-1 to >>200 cm-1 (300 GHz to 6 THz)

High Rayleigh Attenuation > O.D. 8

L-Cystine Spectrum from SureBlockTM XLF System

Raman Shift (cm

-1

) / (THz)

Simultaneous Stokes and anti-Stokes

Ram

an S

igna

l (a.

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Extending Raman into the THz RegimeHigh Performance Lasers, Filters, and Systems for Raman and THz Spectroscopy

THz-Raman Performance from a single-stage spectrometer

THz-Raman Filter Systems

ASE Filters + Laser Systems

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From high-performance lasers and ultra narrow-band filters, to completely integrated THz-Raman spectroscopy systems, Ondax offers an unmatched range of compact, cost-effective solutions that can dramatically improve your overall system performance.

Triple-stage performance from a single-stage spectrometerOur patented1 SureBlock™ ultra narrow-band notch filters, combined with our SureLock™ lasers and NoiseBlock™ ASE filters, can upgrade a single-stage spectrometer to triple-stage performance (fig. 1). Enabling measurements down into the “THz regime” (300GHz -3THz, or 4 >4 >4 >4 >4

Transmission Efficiency (%) 60% 65% 70% 80% 90%

1 US Patents 7,986,407 and 8,184,285 2 Data taken using Ondax SureBlock™ notch filters and a single-stage spectrometer at 785 nm

Fig. 2 THz-Raman spectra of Carbamazepine shows clearly differentiated polymorphic forms

Ultra-narrow-band Notch Filters

Fig. 4 Typical ASE performance at 785nm

Wavelength stabilized laser

ASE VHG Filter

TransmittedASE light

ASE �ltered laser beam

Specularre�ection

Mirror or 2ndASE VHG Filter

Designed to deliver fast, affordable access to ultra low-frequency/THz-Raman signals, all SureBlock XLF Systems offer > OD 8 Rayleigh suppression and enable capture of both Stokes and anti-Stokes signals from 5000cm-1 (300GHz - 150THz). They can be adapted for use with any single-stage spectrometer or Raman system.

All XLF Series platforms are ultra-compact and include configurations to match any requirement. The base XLF model is an integrated double-notch system with selectable fiber- or free-space input and outputs. The XLF-C is a confocal design, which includes ASE reduction, configurable sample and output ports, and fiber-coupled compatibility with our SureLock™ single frequency laser modules or other single-frequency laser sources. The XLF-CLM is a fully integrated confocal THz-Raman spectroscopy front-end, which includes a single-frequency laser source module, with optional cuvette holder or microscope objective, and can be adapted to be directly integrated with existing Raman workstations and micro-Raman systems. Complete turnkey systems, including fully configured spectrometers, are also available.

SureLock™ Wavelength Stabilized Laser Modules incorporate the Ondax PowerLocker® VHG filter to provide stabilized, single-frequency spectral performance ideally suited for Raman and THz-Raman spectroscopy. The compact footprint, narrow linewidth, and low power consumption of these modules deliver portable, affordable, instrument-quality performance for a diversity of applications. Available in a wide range of wavelengths, power levels, and form factors, Ondax can also custom-configure a wavelength-stabilized solution to meet your exact application requirements.

The NoiseBlock™ ASE (Amplified Spontaneous Emission) filters are designed to effectively suppress the broadband ASE spectral background of a single frequency laser by >40dB, to create a pure ASE-free beam. NoiseBlock filters are highly effective at creating the pure spectral excitation beam required for ultra-low frequency THz-Raman spectroscopy applications, and are well suited to match the spectral profile of the notch filter. With >90% efficiency within the narrow spectral bandwidth of less than 150pm, they can also be used as spectrally selective 90/10 beamsplitters. Wavelengths range from 400nm to 2000+nm, ASE Filters are available in both free-space and fiber-coupled configurations.

Figure 4 shows > 70 dB noise suppression using a NoiseBlock ASE filter on a 785nm laser diode.

Wavelength Stabilized Laser Modules

ASE Filters and BeamsplittersFiber-coupled ASE

LM Series

FCLM Series

RO Series

Free-space ASE

THz-Raman Filter Systems

CleanLine Series

SureBlock™ XLF

SureBlock™ XLF-C

SureBlock™ XLF-CLM

Extending Raman into the THz RegimeHigh Performance Lasers, Filters, and Systems for Raman and THz Spectroscopy

THz-Raman Performance from a single-stage spectrometer

World-Class Quality

Over 10 years of Excellence and InnovationOndax is the world’s largest manufacturer of high-performance Volume Holographic Grating (VHG) filters, wavelength-stabilized laser sources, and high-performance Raman filter systems for industrial, defense, instrumentation and scientific applications. Since our founding in 2000, Ondax has been enabling advancements in high-power diode-pumped, ultrafast, and direct-diode laser performance for customers across the globe. Our proprietary high-volume manufacturing processes and fully automated, wafer-level testing ensure 100% specification conformance across the full aperture of the grating, along with 100% product traceability. And our record of innovative design, collaborative development, rapid prototyping, component quality and reproducibility, and rapidly scalable, high-volume supply has earned us the position of supplier of choice for the world’s largest industrial and defense laser companies worldwide.

Our state-of-the-art VHGs improve laser diode performance by increasing spectral brightness, locking the emission wavelength, increasing environmental stability, and improving manufacturing yields. For Raman spectroscopists, our ultra-low-frequency Raman filter systems enable capture of Raman spectra in the Terahertz spectroscopy regime (10 cm-1 to 200 cm-1, or 300 GHz to 6 THz) using any single stage spectrometer. And for ultra-fast lasers, chirped VHGs reduce the form factor of conventional pulse compressors while enabling higher laser powers. Ondax VHG-stabilized diode lasers cover wavelengths from 405nm to 830nm for applications in Raman spectroscopy, biomedical and analytical instrumentation, environmental sensing, metrology, and scientific research.

Optimized Design

High-Volume Manufacturing

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