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Updated: Feb 9, 2026
09:39
In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
Published on: May 27, 2013
12.8K
Energy scalable, offset-free ultrafast mid-infrared source harnessing self-phase-modulation-enabled spectral
Optics Letters
|June 16, 2018
Summary
We developed a new ultrafast mid-infrared laser using difference-frequency generation (DFG). This laser produces powerful, tunable pulses and shows that increasing signal power efficiently boosts mid-infrared output.
Area of Science:
- Optics and Photonics
- Laser Physics
- Nonlinear Optics
Background:
- Ultrafast laser sources are crucial for spectroscopy and material processing.
- Generating high-power, tunable mid-infrared (IR) light remains a challenge.
- Difference-frequency generation (DFG) is a versatile nonlinear optical technique for frequency conversion.
Purpose of the Study:
- To demonstrate a high-power, offset-free ultrafast mid-IR laser source.
- To investigate power scaling strategies for DFG-based mid-IR lasers.
- To achieve tunable mid-IR pulses with significant average power.
Main Methods:
- Utilizing difference-frequency generation (DFG) for mid-IR generation.
- Employing fiber-optic nonlinearities, primarily self-phase modulation (SPM), for spectral broadening.
- Filtering specific spectral lobes to obtain powerful signal pulses.
- Experimental and numerical analysis of power scaling.
Main Results:
- Demonstrated an offset-free ultrafast mid-IR laser source.
- Achieved tunable mid-IR pulses from 7 to 18 μm.
- Obtained up to 5.4 mW of average power.
- Showed that increasing signal power is an effective method for power scaling.
Conclusions:
- The developed DFG laser is a viable source for high-power, tunable mid-IR generation.
- Power scaling by increasing signal power is confirmed as an efficient approach.
- This work advances the capabilities of ultrafast mid-IR laser technology.
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