Integrated Photonic Device for Wavelength-Stable Laser Oscillation and Simultaneous Input Coupling

A guided-mode-resonance device for both narrow-band retroreflection and waveguide input coupling was designed and fabricated for operation wavelength of 1550 nm. It consists of a focusing grating coupler (FGC) integrated in a waveguide cavity resonator constructed by a pair of distributed Bragg refl...

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Bibliographic Details
Published in:IEEE photonics journal 2023-02, Vol.15 (1), p.1-6
Main Authors: Ozawa, Keisuke, Taniguchi, Aika, Ueda, Ryohei, Teranishi, Shunsuke, Watanabe, Akari, Inoue, Junichi, Kintaka, Kenji, Ura, Shogo
Format: Article
Language:English
Subjects:
Bragg reflectors
Cavity resonators
Coupling
Couplings
Distributed Bragg reflectors
External cavity lasers
grating couplers
Gratings
guided mode resonance
integrated photonics
Reflection
Retroreflection
Semiconductor optical amplifiers
Substrates
Waveguide lasers
Waveguides
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Summary:A guided-mode-resonance device for both narrow-band retroreflection and waveguide input coupling was designed and fabricated for operation wavelength of 1550 nm. It consists of a focusing grating coupler (FGC) integrated in a waveguide cavity resonator constructed by a pair of distributed Bragg reflectors (DBRs) on a reflection substrate. The size of the FGC was 31 × 20 μm 2 . The device was used as a laser mirror of an external cavity laser. The oscillation wavelength was fixed to the retroreflection wavelength, and the laser power was coupled to a waveguide. The coupled power depends on the length of one DBR. The optimal length for the maximum coupling was also discussed theoretically and experimentally.
ISSN:1943-0655
1943-0647
DOI:10.1109/JPHOT.2023.3241362