On-chip polarization rotator for type I second harmonic generation

Eric J. Stanton; Lin Chang; Weiqiang Xie; Aditya Malik; Jon Peters; Jeff Chiles; Nima Nader; Gabriele Navickaite; Davide Sacchetto; Michael Zervas; Kartik Srinivasan; John E. Bowers; Scott B. Papp; Sae Woo Nam; Richard P. Mirin

doi:10.1063/1.5122775

APL Photonics (Dec 2019)

On-chip polarization rotator for type I second harmonic generation

Eric J. Stanton,
Lin Chang,
Weiqiang Xie,
Aditya Malik,
Jon Peters,
Jeff Chiles,
Nima Nader,
Gabriele Navickaite,
Davide Sacchetto,
Michael Zervas,
Kartik Srinivasan,
John E. Bowers,
Scott B. Papp,
Sae Woo Nam,
Richard P. Mirin

Affiliations

Eric J. Stanton: Applied Physics Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
Lin Chang: Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, USA
Weiqiang Xie: Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, USA
Aditya Malik: Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, USA
Jon Peters: Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, USA
Jeff Chiles: Applied Physics Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
Nima Nader: Applied Physics Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
Gabriele Navickaite: LIGENTEC SA, EPFL Innovation Park, Bâtiment L, 1024 Ecublens, Switzerland
Davide Sacchetto: LIGENTEC SA, EPFL Innovation Park, Bâtiment L, 1024 Ecublens, Switzerland
Michael Zervas: LIGENTEC SA, EPFL Innovation Park, Bâtiment L, 1024 Ecublens, Switzerland
Kartik Srinivasan: Microsystems and Nanotechnology Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
John E. Bowers: Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, USA
Scott B. Papp: Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
Sae Woo Nam: Applied Physics Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
Richard P. Mirin: Applied Physics Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA

DOI: https://doi.org/10.1063/1.5122775
Journal volume & issue: Vol. 4, no. 12
pp. 126105 – 126105-7

Abstract

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We demonstrate a polarization rotator integrated at the output of a GaAs waveguide producing type I second harmonic generation (SHG). Form-birefringent phase matching between the pump fundamental transverse electric (TE) mode near 2.0 µm wavelength and the signal fundamental transverse magnetic (TM) mode efficiently generates light at 1.0 µm wavelength. A SiN waveguide layer is integrated with the SHG device to form a multifunctional photonic integrated circuit. The polarization rotator couples light between the two layers and rotates the polarization from TM to TE or from TE to TM. With a TE-polarized 2.0 µm pump, type I SHG is demonstrated with the signal rotated to TE polarization. Passive transmission near 1.0 µm wavelength shows ∼80% polarization rotation across a broad bandwidth of ∼100 nm. By rotating the signal polarization to match that of the pump, this SHG device demonstrates a critical component of an integrated self-referenced octave-spanning frequency comb. This device is expected to provide crucial functionality as part of a fully integrated optical frequency synthesizer with resolution of less than one part in 1014.

Published in APL Photonics

ISSN: 2378-0967 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics
Website: https://aplphotonics.aip.org

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