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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Published on: March 20, 2017
Intermodal four-wave mixing in a higher-order-mode fiber
Ji Cheng1, Martin E V Pedersen, Kriti Charan
1School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.
Applied Physics Letters
|November 16, 2012
Summary
We demonstrate efficient intermodal four-wave mixing in a fiber system. This process generates new light wavelengths with high conversion efficiency, enhancing system stability.
Area of Science:
- Nonlinear Optics
- Fiber Optics
- Photonics
Background:
- Four-wave mixing (FWM) is a key nonlinear optical process.
- Intermodal FWM utilizes different spatial modes within a fiber.
- High-order-mode (HOM) fibers support multiple spatial modes.
Purpose of the Study:
- To demonstrate a high-efficiency intermodal four-wave mixing (FWM) process.
- To investigate FWM in an all-fiber system using a picosecond fiber laser and a HOM fiber.
- To analyze the generation of anti-Stokes and Stokes photons in specific fiber modes.
Main Methods:
- Utilizing a picosecond fiber laser as the pump source.
- Employing a high-order-mode (HOM) fiber to support multiple spatial modes (LP01 and LP02).
- Analyzing the spatial overlap between different fiber modes due to wavelength-dependent mode profiles.
Main Results:
- Achieved a high-efficiency intermodal FWM process.
- Generated an anti-Stokes photon in the LP01 mode and a Stokes photon in the LP02 mode from two pump photons in the LP01 mode.
- Obtained 20% conversion efficiency for the anti-Stokes wave at 941 nm with 20 nJ input pulse energy.
- Demonstrated enhanced system stability due to wave guidance in the HOM fiber.
Conclusions:
- The study successfully demonstrates efficient intermodal FWM in an all-fiber system.
- HOM fibers enable significant spatial mode overlap, crucial for efficient nonlinear processes.
- The generated light is guided within the HOM fiber, leading to improved system stability and potential applications in wavelength generation.
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