Abstract

Femtosecond laser drilling is used to produce a variablepressure fiber gas cell. Tightly focused laser pulses are used to produce micrometer-diameter radial channels in a hollow-core photonic band-gap fiber (HC-PBGF), and through these microchannels the core of the fiber is filled with a gas. The fiber cell is formed by fusion splicing and sealing the ends of the HC-PBGF to standard step-index fiber. As a demonstration, acetylene is introduced into an evacuated fiber at multiple backing pressures and spectra are measured.

Highlights

  • Focused laser pulses are used to produce micrometer-diameter radial channels in a hollow-core photonic band-gap fiber (HC-PBGF), and through these microchannels the core of the fiber is filled with a gas

  • The fiber cell is formed by fusion splicing and sealing the ends of the HC-PBGF to standard step-index fiber

  • We present a noninvasive approach to filling and evacuating HC-PBGF via a micrometer-sized channel drilled through the fiber wall with focused femtosecond laser pulses

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Summary

Introduction

Abstract: Femtosecond laser drilling is used to produce a variablepressure fiber gas cell. Focused laser pulses are used to produce micrometer-diameter radial channels in a hollow-core photonic band-gap fiber (HC-PBGF), and through these microchannels the core of the fiber is filled with a gas. The fiber cell is formed by fusion splicing and sealing the ends of the HC-PBGF to standard step-index fiber.

Results
Conclusion

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