Mid-IR Comb
Mid-Infrared Optical Frequency Comb
Mid-Infrared Offset-Free Optical Frequency Comb Based on PM Erbium and Ytterbium Fiber Technology
World-leading optical frequency comb technology is now available in the midinfrared region.
Taking advantage of Menlo Systems’ proprietary figure 9® modelocking technology, Menlo Systems’ difference frequency generation (DFG) based Mid-IR combs provide access to the 3-14 µm range.
The reliable, turn-key mid-IR Comb is an enabling tool for applications in the important fingerprint region for high accuracy spectroscopy or nanoFTIR.
Features
- Broad Spectral Range
- Flexible Repetition Rates
- Wide Spectral Bandwidth
- High Output Power
- Automated All-in-one System
- - CEP Offset-Free Frequency Comb
- - fs Laser Pulses in the Mid-Infrared
- - Phase-Locked Repetition Rate
Key Specifications
- - Repetition Rate 100 MHz or 250 MHz
- - Spectral Range 3 - 5 and 5 - 14 µm
- - High Output Power of up to 200 mW
- - Large Spectral Bandwidth of 50 cm-1 – 300 cm⁻¹
Applications
- - Fourier-Transform Spectroscopy in the Mid-IR
- - Spectroscopy in the “Fingerprint Region” of Molecular Science
- - Chemical and Biomolecular Sensing of Molecules
- - Fast and Precise Detection of Atmospheric Gases
Specifications
Mid-IR Comb 3-5 | Mid-IR Comb 5-8 | Mid-IR Comb 8-14 | |
| Center Wavelength | factory-set value selectable in the 3-5 µm range | factory-set value selectable in the 5-8 µm range | factory-set value selectable in the 8-14 µm range |
| Average Output Power | >100 mW in range 3.2-4.2 µm, above 4.2 µm best effort | >0.5 mW | >0.5 mW |
| Wavelength Tuning (optional) | discrete, automated | continuous, manual | continuous, manual |
| Repetition Rate | 100 MHz or 250 MHz | 100 MHz | 100 MHz |
Requirements
| Input Requirements | 10 MHz frequency reference, power level +7 dBm |
| Operating Voltage | 100/115/230 VAC |
| Frequency | 50 to 60 Hz |
| Operating Temperature | 22 ± 5 °C |
Optical Scheme
Starting from Menlo’s turn-key, reliable figure 9® fiber laser oscillators, a two-color femtosecond laser system is realized using spectral shifting in highly nonlinear fibers.
The two branches of femtosecond pulses of different wavelengths are spatially and temporally overlapped and subsequently focused into a nonlinear crystal for difference frequency generation (DFG).
This allows the generation of femtosecond pulses in the mid-IR covering the spectral range from 3 µm to 14 µm with high output power levels of up to 200 mW.
Menlo offers a fully automized tuning for the 3-5 µm comb. The comb system covering 5-8 and 8-14 µm requires semi-manual tuning.
For accurate measurements, Menlo offers an easy to use stabilization of the comb repetition rate and carrier envelope offset, which can be phase locked to an RF reference or optical reference allowing to generate sub-Hz optical linewidth in the mid-IR.
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