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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

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Published on: August 5, 2013

Efficient multi-mode to single-mode coupling in a photonic lantern.

Danny Noordegraaf¹, Peter M W Skovgaard, Martin D Nielsen

¹Crystal Fibre A/S, Blokken 84, DK-3460 Birkerød, Denmark. dno@crystal-fibre.com

|February 4, 2009

Summary

We fabricated a high-performance all-glass photonic lantern, a multi-mode (MM) to single-mode (SM) fiber splitter. This device enables efficient, reversible coupling between MM and SM fibers with minimal loss.

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Area of Science:

Optics and Photonics
Fiber Optic Technology
Nanofabrication

Background:

Multi-mode (MM) to single-mode (SM) fiber coupling is crucial for optical communication systems.
Photonic lanterns, first described by Leon-Saval et al. (2005), offer a solution for MM-SM fiber interfacing.
Previous implementations may have limitations in terms of efficiency, reversibility, or fabrication complexity.

Purpose of the Study:

To demonstrate the fabrication of a high-performance, solid all-glass photonic lantern.
To experimentally validate the device's capability for efficient and reversible coupling between MM and SM fibers.
To quantify the coupling loss associated with the MM to SM tapered transition.

Main Methods:

Fabrication of a solid all-glass photonic lantern device.
Experimental setup to test coupling efficiency between MM and SM fibers.
Precise control of launch conditions into the MM fiber to ensure matched conditions.
Measurement of coupling loss at the tapered transition.

Main Results:

Successful fabrication of a solid all-glass photonic lantern.
Demonstration of efficient and reversible coupling between MM and SM fibers.
Achieved a low coupling loss of only 0.32 dB for the MM to SM tapered transition.
Experimental validation of the photonic lantern's feasibility and performance.

Conclusions:

The fabricated all-glass photonic lantern is a high-performance device.
This technology enables efficient and reversible coupling for optical fiber applications.
The low coupling loss confirms the practical viability of this photonic lantern design.