Open AccessEfficient InGaAsP MQW-based polarization controller without active-passive integration
Author(s) -
Maiko Ito,
Kosuke Okawa,
Takahiro Suganuma,
Taichiro Fukui,
Eisaku Kato,
Takuo Tanemura,
Yoshiaki Nakano
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.414387
Subject(s) - polarization (electrochemistry) , materials science , polarization controller , optoelectronics , optics , photonics , phase shift module , polarization rotator , microwave , optical communication , insertion loss , physics , computer science , birefringence , chemistry , telecommunications , wavelength , fiber laser
Carrier-injection-based efficient polarization controller with a strained InGaAsP multiple-quantum-well (MQW) layer is demonstrated on a regrowth-free InP platform. We employ a straight-line device configuration by cascading an asymmetric polarization rotator (PR) to provide a fixed polarization conversion and a polarization-dependent phase shifter (PD-PS) to enable tunable polarization rotation. Based on a novel design concept, both the PR and PD-PS sections are integrated monolithically without active-passive integration. Using the fabricated device, we experimentally demonstrate efficient polarization conversion over the entire Poincaré sphere with a total current of less than 40 mA. With the capability of monolithically integrating other InP-based active components, the demonstrated scheme should be attractive for various applications, such-as low-cost coherent communication, microwave photonics, and quantum key distribution.