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Raman Spectroscopy Instrumentation: Overview

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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
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A cw tunable near-infrared (1.085-1.175-microm) Raman oscillator.

C Lin, R H Stolen, W G French

|August 15, 2009

Summary

This summary is machine-generated.

This study introduces the first continuous-wave (cw) tunable Raman laser operating in the 1.1-micrometer spectrum. Researchers achieved tunable output for first and second Stokes oscillations using a fiber Raman resonator.

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Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

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Area of Science:

Photonics
Laser Physics
Optical Engineering

Background:

Raman lasers offer wavelength tunability for various applications.
Developing continuous-wave (cw) tunable lasers in the 1.1-micrometer region is challenging.
Fiber-based resonators provide a compact and efficient platform for laser development.

Purpose of the Study:

To report the first continuous-wave (cw) tunable Raman laser operating in the 1.1-micrometer spectral region.
To demonstrate tunable first and second Stokes oscillation using a fiber Raman resonator.
To characterize the performance of the developed Raman laser system.

Main Methods:

Utilized a 650-meter-long, low-loss, small-core single-mode silica fiber as the Raman gain medium.
Employed a prism-tuned fiber Raman resonator configuration.
Pumped the fiber with a 5-W continuous-wave (cw) Nd:YAG laser operating at 1.064 micrometers.
Incorporated separate resonator mirrors for first and second Stokes oscillation.

Main Results:

Achieved tunable first Stokes oscillation from 1.085 to 1.13 micrometers.
Obtained tunable second Stokes oscillation from 1.15 to 1.175 micrometers.
Demonstrated the feasibility of cw tunable Raman laser operation in the 1.1-micrometer region.

Conclusions:

The developed prism-tuned fiber Raman resonator is a viable method for generating cw tunable laser light in the 1.1-micrometer range.
This work establishes a new capability for tunable laser sources in this spectral region.
The results pave the way for potential applications in spectroscopy, sensing, and optical communications.