Waveguide tapering for improved parametric amplification in integrated nonlinear Si3N4 waveguides
Artikel i vetenskaplig tidskrift, 2020

In this paper, we propose and numerically investigate waveguide tapering to improve optical parametric amplification in integrated nonlinear Si3N4 circuits. The phase matching condition of parametric amplification changes along the length of uniform Si3N4 waveguides, due to the non-negligible propagation loss, potentially causing peak-gain wavelength shifts of more than 20 nm. By tapering the waveguide width along propagation, we can achieve a 2.5 dB higher maximum parametric gain thanks to the improved phase matching, which can also broaden the amplification bandwidth. Therefore, the length of an optimally tapered Si3N4 waveguide can be 23% shorter than a uniform one in the case of a 3.0 dB/m propagation loss and a single continuous-wavelength pump. Quasi-continuous tapers are efficient to approximate continuous ones and might simplify the fabrication of long tapered nonlinear Si3N4 waveguides, which are promising for optical signal processing and optical communications.

Författare

Ping Zhao

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Zhichao Ye

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Kovendhan Vijayan

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Corentin Naveau

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Jochen Schröder

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Magnus Karlsson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Peter Andrekson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Optics Express

1094-4087 (ISSN)

Vol. 28 16 23467-23477

Brusfria optiska faskänsliga förstärkare och dess tillämpningar

Vetenskapsrådet (VR), 2016-01-01 -- 2025-12-31.

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

Annan elektroteknik och elektronik

DOI

10.1364/OE.389159

PubMed

32752343

Mer information

Senast uppdaterat

2020-10-08