Flat channel-passband-wavelength multiplexing and demultiplexing devices by multiple-Rowland-circle design

A Flattened AWG Demultiplexer with Low Chromatic Dispersion

“…In recent years many methods have been reported for achieving a broadened spectral response of an AWG demultiplexer by using, for example, multimode output waveguides [3], two cascaded grating devices [4], multiple gratings [5], multiple Roland circles [6], a multimode interference (MMI) section [7], or a Y-junction [8]. However, these methods have some drawbacks such as a nonlinear phase response, an increase in the size, or too large an insertion loss of the device.…”

Arrayed waveguide grating multiplexer with boxlike spectral response

“…Liu et al [3] presented a slot antenna using a semicircle-upon-square slot fed by a rectangular microstrip line; this configuration offers a relative bandwidth of 120%. Another structure in [4] based on a circular slot fed by a rectangular microstrip line has been reported, where a bandwidth of 124.6% has been obtained.…”

“…These structures are implemented with both coplanar wave guide (CPW) and microstrip technologies [2][3][4]. In [2], a rectangular slot fed by a CPW line was proposed, and a bandwidth of 110% achieved with an average gain of about 2 dBi.…”

“…These techniques include using multimode output waveguides [1], a multimode interference (MMI) coupler in the input waveguide [3], and a triple-Rowland-circle structure [4], and varying the lengths and positions of the arrayed waveguides [6].…”

Design of narrow channel spacing photonic wire AWG on SOI with three stigmatic points

“…Recently, there has been considerable progress in the development of WDM technology [1] . Meanwhile, wavelength multiplexers and demultiplexers (MUX/DEMUX) are the fundamental components for WDM network systems.…”