Improved arrayed-waveguide-grating layout avoiding systematic phase errors

Abstract

Abstract:We present a detailed description of an improved arrayedwaveguide-grating (AWG) layout for both, low and high diffraction orders. The novel layout presents identical bends across the entire array; in this way systematic phase errors arising from different bends that are inherent to conventional AWG designs are completely eliminated. In addition, for highorder AWGs our design results in more than 50% reduction of the occupied area on the wafer. We present an experimental characterization of a loworder device fabricated according to this geometry. The device has a resolution of 5.5 nm, low intrinsic losses (< 2 dB) in the wavelength region of interest for the application, and is polarization insensitive over a wide spectral range of 215 nm. Lourdudoss, and S. J. B. Yoo, "InP-based arrayed-waveguide grating with a channel spacing of 10 GHz," in

Investigation of 18-channel CWDM arrayed waveguide grating with silica-based waveguide

“…Undesirable coupling between adjacent arrayed WGs causes optical phase distortion. 7 Accordingly, wide-FSR AWGs have been realized with the use of gull wing (GW)-shaped AWG layouts 8 and S-shaped AWG layouts, 9 with geometric calculations as reported by Ismail et al 10 In this paper, we report on an 18-channel CWDM AWG covering the wavelength range from 1250 to 1610 nm.…”

“…The construction details are provided in Ref. 10, with the only difference in our study being the removal of one arc WG in section I for a simplified layout and design calculation. Detailed descriptions of the calculation are also provided in Ref.…”

Low‐resolution Raman spectroscopy over a wide spectral range with a single‐diffraction order arrayed‐waveguide grating

“…Figure illustrates the AWG design, with input channel, arrayed waveguides surrounded by two free‐propagation regions, and several output channels. Further details on the characterization of the AWG that was used in this paper can be found elsewhere …”

Integrated optical modules for miniature Raman spectroscopy devices

“…The most popular diffraction grating based micro-spectrometer device is the arrayed waveguide grating and it is used for many applications such as optical coherence tomography, Raman spectrometry, confocal microscopy, multiwavelength light sources etc. [16,[47][48][49][50][51][52][53]. Planar grating structures are another alternative for this kind of integrated optics spectrometers [54][55][56].…”