Broadband and Ultrahigh Resolution Spectrometer Based on a Multimode Waveguide
This invention is used in analytical chemistry, biochemical sensing, material analysis, optical communication, and medical applications.
Researchers
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methods and apparatus for spectrometry using multimode interference in a tapered spiral-shaped waveguide
United States of America | Granted | 9,709,440
Technology
The invention is a monolithic, compact spectrometer based on multimode interference (MMI) and can simultaneously achieve high resolving power and bandwidth in a simple-to-couple and compact device. It matches the performance of large grating spectrometers using modal interference in a multimode waveguide with an area of a few square millimeters or less. These kinds of MMI spectrometers could be used in applications requiring broadband operation and high-resolution spectroscopic analysis.
Problem Addressed
Developing miniature spectrometers require sacrificing the high spectral resolution and broad operating range possible in large grating spectrometers. Therefore, there is a need to develop compact spectrometers with high resolution and broad operating range.
Advantages
- Wider operating range than other millimeter scale spectrometersIt offers both high resolving power and fractional bandwidth within a compact device
- Comparative performance with large grating spectrometers
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