Difference Frequency Generation



Convert Wavelengths into the MID-IR with Difference Frequency Generation (DFG)


Difference Frequency Generation

HarmoniXX DFG is designed to extend APE’s product line of wavelength converters into the Mid IR range. It mixes Signal and Idler output beams of synchronously pumped OPOs and is available for various pump sources. The DFG output wavelength can be changed easily by tuning the OPO Signal. It covers a wide wavelength range of 4 … > 15 μm.

User-friendly Design

HarmoniXX DFG has an integrated wavelength separation for maximum usability. The output is very stable benefitting from the fact that the OPO output pulses are intrinsically jitter-free. The DFG is available for femtosecond and picosecond OPOs of different wavelength ranges.

At a Glance

  • Compatible with OPO-X and Levante IR
  • Easy manual wavelength tuning
  • Integrated beam overlap
  • Delay line included
  • Connection for purge included

picosecond Version

HarmoniXX DFG is available in different versions, depending on the pump source and the pulse width. The picosecond version can be pumped by pulses with 2 … 6 ps pulse width and is able to reach wavelengths from 4.8 … 15 μm. It is optimized for high resolution measurements and pulses with narrow bandwidth. Therefore it is perfect for Sum Frequency Mixing Spectroscopy.

femtosecond Version

The femtosecond version of HarmoniXX DFG delivers short pulses with broad spectral bandwidth in the MIR. The standard version can be tuned from 4.8 … 15 μm. The HarmoniXX DFG fs is especially suitable for applications that require high time-resolution such as fs s-SNOM. The crystal used in the HarmoniXX DFG fs is optimized for high output power and best bandwidth conversion.

Specifications

HarmoniXX DFG Specification
Pump sourceLevante IR fsLevante IR psOPO-X fs (with Idler)
OPO pump parameter12 W with 120 fs8 W with 2 ps3.5 W with 800 nm, 140 fs
Output wavelength range4.8 … 15 μm
4.8 … 15 μm
4.0 … 11 μm
Corr. wavenumber range2080 … 667 cm-12080 … 667 cm-12500 … 910 cm-1
Output power45 mW at 6 µm75 mW at 6 µm3.5 mW at 4 µm
Spectral bandwidth> 125 cm-1 at 6 µmtyp. 10 … 15 cm-1 at 6 µmtyp. 90 cm-1 at 4 µm
Pulse widthtyp. < 200 fstyp. 2 pstyp. 200 fs

Typical Data

Typical DFG power vs. wavenumber
Typical DFG spectra

Datasheets & Brochures


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