Adiabatic mode multiplexer for evanescent-coupling-insensitive optical switching

Abstract

A novel adiabatic mode multiplexer enables a 2 x 2 optical switch whose operation does not depend on accumulated phase due to evanescent coupling between waveguides. The adiabatic mode multiplexer has a negligible insertion loss over C+L bands and modal cross talk better than -40 dB for any polarization state. Mode multiplexing is achieved by adiabatic transition from the fundamental mode of the single-mode waveguide to the higher mode of the multimode waveguide. Experimental measurement results for a device realized in silica-on-silicon technology are presented. By directly measuring the nonadiabatic transition probability, we show that the adiabatic mode multiplexer operates in the Landau-Zener regime.

Mode-selective wavelength conversion based on four-wave mixing in a multimode silicon waveguide

“…This technology is also promising in order to increase the capacity of silicon data busses for on-chip optical interconnections [4][5][6][7][8][9][10]. MDM may be used to enhance the throughput of the interconnections while limiting the number of required optical sources [4], whose integration onto the silicon platform is still the object of investigations.…”

Tapping Light From Waveguides by High-Order Mode Excitation and Demultiplexing

“…In concept, our design is similar to that presented in [9], but as will be described, our implementation is different, employing a novel device, the adiabatic mode-demultiplexer [10], [11]. In both designs, the tap consists of two functional stages (Fig.…”

“…Our novel approach is the adiabatic mode demultiplexer, which exhibits extremely low WDL and PDL and is highly robust to process induced variations. Although a full description of the device is given in [10] and [11], a brief description is given here in order to more fully appreciate the inherent benefits of the design.…”

Serial branching mode multi/demultiplexer for homogeneous multi-core fibers

“…This multiplexer has some advantages such as the large fabrication tolerance and small wavelength and polarization dependences, since this device is based on the adiabatic mode evolution [10,11].…”