1. Introduction Silicon nitride-based waveguides form a promising, CMOS-compatible platform in inte- grated photonics research [1]. Especially, stoichiometric silicon nitride (Si$_{3}$N$_{4}$) deposited using low-pressure chemical vapor deposition (LPCVD) offers extremely low intrinsic losses and superior reproducibility. Further advantages of this platform are a broad transparency ranging from the visible [2] to the mid-infrared, a high index contrast and absence of two-photon absorption in the near-infrared, including all the telecom- munication bands. Due to their low propagation losses in the C-band as well as their low coupling losses by using spot-size converters Si$_{3}$N$_{4}$ waveguides are favored in the field of microwave photonics [3, 4] and for novel types (glass-semiconductor) lasers with record low spectral bandwidth [5, 6]. Furthermore, ultra-low propagation losses in the C-band of 0.32 dB/m have been demonstrated with weakly confined modes using 40 nm thin Si$_{3}$N$_{4}$ waveguides [7, 8]. The low confinement of the mode, however, has the draw- back of increased bending losses and, as a consequence, limit the density of devices in integrated circuits. Further applications of Si$_{3}$N$_{4}$ waveguides are, e.g., bio-chemical applications such as optical coherence tomography [9] and lab-on-a-chip devices due to the compatibility of Si$_{3}$N$_{4}$ waveguides with microfluidic channels [10, 11]. Furthermore, Si$_{3}$N$_{4}$ waveguides are of high interest for nonlinear integrated photon- ics [1] due to their high Kerr index [12], while supporting highly confined modes due to their high index contrast and lacking nonlinear losses in the near-infrared. Nonlinear effects such as supercontinuum generation [13] and parametric frequency comb gener- ation [14] have been demonstrated. For the latter, huge potential in nonlinear optical signal processing was shown by transmitting a data stream of 1.44 Tbit/s [15]. It is desir- able to select the waveguides such that the pump wavelength for broadband wavelength conversion lies in the spectral region where laser sources are readily available, i.e. 1000 to 2000 nm. However, to obtain phase matching for broadband wavelength conversion, the dispersion of the waveguide must be engineered such that pump wavelength is in the anomalous dispersion regime, while also being close to the zero dispersion wavelength (ZDW). To achieve high modal confinement and to shift the ZDW to the near-infrared, the