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Related Experiment Video

Updated: May 27, 2026

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Jammed-array wideband sawtooth filter.

Zhongwei Tan¹, Chao Wang, Keisuke Goda

¹Institute of Lightwave Technology, Key Lab of All Optical Network & Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 100044, China.

|November 24, 2011

Summary

This summary is machine-generated.

We developed a low-cost, all-optical spectral filter creating a sawtooth pattern without active components. This filter enables fast, sensitive interrogation of fiber Bragg grating sensors and high-frequency waveform generation.

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Area of Science:

Photonics
Optical Engineering
Signal Processing

Background:

Traditional spectral filters often require active components, increasing cost and complexity.
High-resolution spectral filtering is crucial for advanced sensing and signal generation applications.

Purpose of the Study:

To introduce a novel all-optical passive spectral filter with a unique sawtooth output.
To demonstrate the filter's utility in fiber Bragg grating sensor interrogation and high-frequency waveform generation.

Main Methods:

Utilizing a phased array of virtual light sources and controlled diffraction orders.
Implementing partial masking to create a periodic sawtooth spectral pattern.
Leveraging the linear frequency-intensity mapping for signal processing.

Main Results:

Achieved a high-resolution periodic sawtooth spectral pattern passively.
Demonstrated fast and sensitive interrogation of fiber Bragg grating sensor arrays.
Generated ultrahigh-frequency electrical sawtooth waveforms.

Conclusions:

The developed spectral filter offers a low-cost, passive solution for advanced optical applications.
The filter's unique spectral properties enable novel approaches to sensor interrogation and waveform generation.