Circular cross section waveguides processed by multi-foci-shaped femtosecond pulses

We developed a simple multi-foci-shaped femtosecond pulsed (MFSFP) method for processing circular cross section waveguides in transparent materials. With this flexible processing method, the focus energy distribution can be designed freely and arbitrarily, and single-mode waveguides with cross section circularity better than 96.0% were achieved. The mode shape difference (1.93%) of circular waveguides is smaller than the difference (7.01%) of normal elliptical waveguides. The coupling abilities of the two kinds of waveguides were investigated with three-dimensional (3D) directional couplers in both experiments and theoretical simulations. The coupling coefficient difference of circular waveguides in vertical and horizontal coupling directions was ∼0.01mm-1, which was smaller than 0.33mm-1 of normal waveguides. The circular symmetric waveguides will play an important role in large-scale high-intensity 3D photonic integrated circuits.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:46

Enthalten in:

Optics letters - 46(2021), 3 vom: 01. Feb., Seite 520-523

Sprache:

Englisch

Beteiligte Personen:

Li, Ze-Zheng [VerfasserIn]
Li, Xiao-Yan [VerfasserIn]
Yu, Feng [VerfasserIn]
Chen, Qi-Dai [VerfasserIn]
Tian, Zhen-Nan [VerfasserIn]
Sun, Hong-Bo [VerfasserIn]

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Journal Article

Anmerkungen:

Date Revised 03.02.2021

published: Print

Citation Status PubMed-not-MEDLINE

doi:

10.1364/OL.414962

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM320893693