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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Inter-modal four-wave mixing study in a two-mode fiber.

S M M Friis, I Begleris, Y Jung

|January 7, 2017

Summary

This summary is machine-generated.

We achieved efficient four-wave mixing in a 1-km two-mode fiber, generating phase conjugation and Bragg scattering idlers in different spatial modes. Bragg scattering showed a larger bandwidth than phase conjugation under optimal conditions.

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Area of Science:

Optical Engineering
Nonlinear Optics
Fiber Optics

Background:

Four-wave mixing (FWM) is a key nonlinear optical process.
Utilizing different spatial modes in optical fibers offers new avenues for FWM applications.
Telecommunication wavelengths are crucial for optical communication systems.

Purpose of the Study:

To demonstrate efficient four-wave mixing (FWM) between different spatial modes in a long-haul fiber.
To experimentally characterize the phase matching efficiency and bandwidth of FWM processes.
To compare the performance of phase conjugation (PC) and Bragg scattering (BS) in this context.

Main Methods:

Experimental setup utilizing a 1-km long two-mode fiber.
Excitation of LP01 and LP11 spatial modes using two pump lasers.
Generation of phase conjugation (PC) and Bragg scattering (BS) idlers in the LP11 mode.
Numerical simulations to support experimental findings.

Main Results:

Efficient FWM was demonstrated between LP01 and LP11 modes at telecommunication wavelengths.
Phase matching efficiency and bandwidth were found to be critically dependent on pump wavelength separation.
Bragg scattering (BS) exhibited a larger bandwidth than phase conjugation (PC) at optimal pump wavelength separation.

Conclusions:

Spatial mode multiplexing in FWM offers efficient light manipulation in optical fibers.
Precise control over pump wavelength separation is essential for optimizing FWM performance.
Bragg scattering is a promising technique for broadband applications in mode-division multiplexing systems.