Technological verification of size-optimized 160-channel silicon nitride-based AWG-spectrometer for medical applications

• DOI: 10.1007/s00340-019-7192-1
• Publication Date: 2019-05-06T13:26:47Z
• Authors: Dana Seyringer; M. Sagmeister; A. Maese-Novo; M. Eggeling; E. Rank; P. Muellner; R. Hainberger; W. Drexler; M. Vlaskovic; H. Zimmermann; G. Meinhardt; J. Kraft
• Keywords: Channel spacing; Arrayed waveguide grating

We present the technological verification of a size-optimized 160-channel, 50-GHz silicon nitride-based AWG-spectrometer. The spectrometer was designed for TM-polarized light with central wavelength 850 nm applying our proprietary "AWG-Parameters" tool. For simulations AWG layout, WDM PHASAR photonics tool from Optiwave used. simulated results show satisfying optical properties However, high-channel count causes large size standard design approaches. To solve this problem we special taper enabling reduction structure by about 15% while keeping same properties. fabricated and measured spectra not only confirm proposed size-reduction but also improvement AWG.