Thermo-Optic Tunable Silicon Arrayed Waveguide Grating at 2-μm Wavelength Band

Abstract

The transparent window in optical fiber at 2-μm waveband enables a huge potential for fiber optical communications. Intensive efforts have been devoted to pursuit of photonic devices in this new band. The arrayed waveguide grating (AWG) is one of the key components for various functionalities like wavelength multiplexer, optical filter, spectrometer and so forth. However, the integrated and wavelength tunable AWG has not been realized in the 2-μm wavelength range yet. Here, we demonstrate an 8-channel thermo-optic tunable AWG at 2 μm via silicon photonic multi-project wafer shuttle run. The device is fully compatible with standard foundry fabrication process without customization. The TiN heater is designed for uniform waveguide heating and wavelength detuning. Experiments show that the fabricated AWG has a dense channel spacing of 1.6 nm and a minimum insertion loss of 6.1 dB. The wavelength tuning efficiency is measured to be 6.4 nm/W.

Silicon Thermo-Optic Switches with Graphene Heaters Operating at Mid-Infrared Waveband

“…Integrating critical components at the chip level [ 11 , 12 ] would be an indispensable choice to achieve higher reliability, lower cost, smaller footprint, and reduced power consumption [ 1 ]. Laser sources [ 13 ], amplifiers [ 14 ], low-loss waveguides [ 15 ], wavelength gratings [ 16 ], multiplexers [ 17 ], power splitters [ 18 ], resonators [ 15 ], switches [ 19 , 20 , 21 ], photodetectors [ 22 ], and other components for the integrated photonic circuit at MIR waveband have already been widely studied for lab-on-chip applications.…”

3D design and analysis of an electro-optically tunable athermal and polarization-insensitive ring resonator-based add-drop filter for DWDM systems

“…Different optical filter technologies such as Arrayed Waveguide Gratings (AWGs) [8] , Micro-Electro-Mechanical Structural (MEMS) filters [9] [10] , Thin Films (TF) filters [11] , Mach-Zehnder Interferometers (MZI) filters [12] , Fiber-Bragg Gratings (FBG), and Fabry-Perot (FP) filters [13] [14] , have been reported in the literature. Although the characteristics of ring resonator-based filters are very similar to those of Fabry-Perot cavity-based optical filters, their design does not require facets or gratings and offers the advantage that the injected and reflected signals are separated into individual waveguides, and thus are particularly simple to design [15] .…”

Using Periodic Trapezoidal Ag Strips and Silicon Dioxide Slab for Polarization-Independent Narrowband Absorber

“…Gratings are widely used in many fields due to their special periodic structure. [1][2][3] With its unique characteristics of beam splitting, polarization, dispersion, absorption, and phase matching, gratings occupy an important position in optical communications, [4,5] wavelength division multiplexing, [6][7][8][9] photoelectric sensors, [10][11][12][13][14] liquid crystal displays, [15][16][17] and optical signal acquisition and processing. [18][19][20] The absorber can achieve single-band and multi-band absorption with different structural designs.…”