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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...

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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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Multiaperture planar waveguide spectrometer formed by arrayed Mach-Zehnder interferometers.

Mirosław Florjańczyk1, Pavel Cheben, Siegfried Janz

  • 1CRESS Space Instrumentation Laboratory, York University, Toronto, Ontario, M3J 1P3, Canada. m.florjanczyk@osa.org

Optics Express
|June 25, 2009
PubMed
Summary
This summary is machine-generated.

This study introduces a novel multiaperture Fourier-transform planar waveguide spectrometer. This device significantly enhances optical throughput for spectral analysis using an array of interferometers.

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Area of Science:

  • Optics and Photonics
  • Spectroscopy
  • Waveguide Devices

Background:

  • Conventional spectrometers face limitations in optical throughput (étendue).
  • Fourier-transform spectroscopy offers high resolution but can be complex.
  • Planar waveguide devices enable miniaturization and integration.

Purpose of the Study:

  • To present the concept, theory, and simulations of a new multiaperture Fourier-transform planar waveguide spectrometer.
  • To demonstrate a significant increase in optical throughput compared to conventional designs.
  • To establish design rules for achieving specific spectral resolution and range.

Main Methods:

  • Utilizing an array of Mach-Zehnder interferometers to generate wavelength-dependent spatial fringe patterns.
  • Employing discrete Fourier transformation of the output fringes to calculate the input light spectrum.
  • Developing design rules based on performance specifications like wavelength range and spectral resolution.

Main Results:

  • The multiaperture input design significantly increases optical throughput (étendue).
  • A design example achieved a spectral resolution of 0.025 nm over a 2.5 nm range.
  • Optical throughput was enhanced by a factor of 200 compared to single-input devices.

Conclusions:

  • The proposed multiaperture Fourier-transform planar waveguide spectrometer offers a substantial improvement in optical throughput.
  • The device design is suitable for high-resolution spectroscopy with enhanced light collection efficiency.
  • This technology has potential applications in various fields requiring sensitive spectral analysis.