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67.9 W high-power white supercontinuum all-fiber laser source
Applied Optics
|May 12, 2016
Summary
We developed a record-breaking 67.9 W white supercontinuum (SC) fiber laser, offering a broad and flat spectrum from 500-1700 nm. This high-power SC laser has significant potential for various scientific and industrial applications.
Area of Science:
- Optics and Photonics
- Laser Physics
- Materials Science
Background:
- Supercontinuum (SC) generation is crucial for various applications requiring broadband light sources.
- Existing high-power SC sources often suffer from limited spectral flatness or stability.
- Developing high-power, spectrally broad, and flat SC sources remains a significant challenge in laser technology.
Purpose of the Study:
- To develop and characterize a high-power white supercontinuum (SC) all-fiber laser source.
- To achieve a wide spectral range with good flatness and significant power in the visible waveband.
- To demonstrate a novel fiber laser design for stable high-power SC generation.
Main Methods:
- A 145 W high-power picosecond pulse fiber laser with a 656 MHz repetition frequency was designed to mitigate nonlinear effects.
- A custom-designed high-power mode field adaptor with 82% coupling efficiency was utilized.
- Characterization of the SC source included average power, spectral range, spectral flatness, and visible waveband power.
Main Results:
- Achieved an average output power of 67.9 W from the white SC all-fiber laser source.
- The SC spectrum ranged from 500 to 1700 nm, with a spectral width exceeding 1000 nm.
- The spectrum exhibited flatness below 10 dB (excluding the pump wavelength), with visible waveband power accounting for 21% of the total SC power.
Conclusions:
- The developed 67.9 W white SC fiber laser source represents the highest reported power for such a wide and flat optical spectrum.
- The specialized picosecond pulse fiber laser and high-power mode field adaptor are key components enabling this performance.
- This high-power SC source offers a promising tool for applications demanding broadband, high-intensity light, including spectroscopy, imaging, and material processing.
