IEICE Transactions on Electronics
Online ISSN : 1745-1353
Print ISSN : 0916-8524
Joint Special Section on Opto-electronics and Communications for Future Optical Network
Spatial Mode-Multiplexed Light Source Using Angularly-Multiplexed Volume Holograms
Satoshi SHINADAYuta GOTOHideaki FURUKAWA
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2023 Volume E106.C Issue 11 Pages 765-773

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Abstract

We propose a novel mode-multiplexed light source using angularly-multiplexed volume holograms. Mode division multiplexing beams can be generated from a simple transmitter that is made of a laser array, single lens, and volume holograms. Hologram media has low recording sensitivity; hence, using holograms in the communication band is difficult. However, a dual wavelength method that uses different wavelengths for recording and reading holograms can realize the volume holograms for the infrared region. The volume holograms for three spatial mode multiplexing are formed using a compact Michelson interferometer type recording setup; simultaneous generations of three modes were demonstrated using a fiber array or vertical cavity surface emitting laser array with the volume holograms. A low loss coupling of three modes to few-mode-fiber can be achieved through the precise design and recording of volume holograms. The simple and low-cost mode-multiplexed light source using the volume holograms has the potential to broaden the application of MDM.

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© 2023 The Institute of Electronics, Information and Communication Engineers
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