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Related Experiment Video

Updated: Jun 10, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

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Published on: August 12, 2013

Second-order optical filter based on a mirrored gradient index lens.

W Liang¹, A A Savchenkov, A B Matsko

¹OEwaves Inc., 2555 East Colorado Boulevard, Pasadena, California 91107, USA.

|July 17, 2010

Summary

This summary is machine-generated.

We developed a novel second-order bandpass filter using a gradient index (GRIN) lens and mirrors. Mechanical strain allows tuning the filter

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Area of Science:

Optics and Photonics
Materials Science

Background:

Gradient index (GRIN) lenses offer unique optical properties.
Birefringence in optical materials can be exploited for filtering applications.
Microwave photonics requires efficient and tunable filtering components.

Purpose of the Study:

To demonstrate a novel second-order bandpass filter.
To utilize the birefringence of a GRIN lens for filter functionality.
To investigate the tunability of the filter using mechanical strain.

Main Methods:

Fabrication of a second-order bandpass filter using a single GRIN lens coated with mirrors.
Exploitation of residual and introduced birefringence in the GRIN lens material.
Application of mechanical strain to tune the filter's performance.

Main Results:

Successful demonstration of a second-order bandpass filter.
The filter's function is shown to be tunable via mechanical strain.
The filter leverages the inherent and introduced birefringence of the GRIN lens.

Conclusions:

A novel, tunable second-order bandpass filter has been realized using a GRIN lens.
The filter's tunability through mechanical strain offers practical advantages.
Potential applications in microwave photonics are identified.