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Related Experiment Video

Updated: May 25, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Effective way of reducing coupling loss between rectangular microwaveguide and fiber.

Hang Zhou¹, Zilun Chen, Xiaoming Xi

¹College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, China.

|January 25, 2012

Summary

We developed a new anamorphic photonic crystal fiber (PCF) to reduce signal loss when connecting optical fibers to rectangular waveguides. This method significantly improves coupling efficiency, enhancing data transmission performance.

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Area of Science:

Photonics
Optical Engineering
Materials Science

Background:

Coupling optical fibers to rectangular waveguides often suffers from significant signal loss due to mode mismatch.
Existing methods for fiber-to-waveguide coupling lack efficiency, limiting system performance in various applications.

Purpose of the Study:

To introduce a novel anamorphic photonic crystal fiber (PCF) design to minimize coupling loss.
To enhance the coupling efficiency between conventional single-mode fibers and rectangular waveguides.

Main Methods:

Anamorphic photonic crystal fiber (PCF) was fabricated using postprocessing techniques.
The PCF featured a round core at one end for conventional fiber connection and a rectangular core at the other for waveguide integration.
The PCF was tapered proportionally to facilitate mode transformation.

Main Results:

Numerical simulations confirmed the effectiveness of the proposed method.
The anamorphic PCF approach demonstrated superior performance compared to straight coupling.
An improvement of over 2.8 dB in coupling efficiency was achieved.

Conclusions:

The developed anamorphic PCF effectively reduces mode mismatch losses.
This technique offers a significant enhancement in coupling efficiency for optical fiber to rectangular waveguide connections.
The method presents a promising solution for improving signal integrity in hybrid optical-electronic systems.