Journal ArticleDOI
Waveguide optical isolator based on Mach–Zehnder interferometer
TLDR
In this paper, a waveguide optical isolator based on non-reciprocal interference was proposed, which exhibits a 19 dB extinction ratio at λ=1.54 μm.Abstract:
A waveguide optical isolator based on nonreciprocal interference is demonstrated. Ridge waveguides are fabricated in a Mach–Zehnder configuration on a single film of bismuth-, lutetium-, neodymium-iron garnet. With this design, no polarizers are required to achieve extinction in the backward propagation direction. This isolator exhibits a 19 dB extinction ratio at λ=1.54 μm. A flat wavelength dependence, to within 2 dB, has been observed in the range between 1.49 and 1.57 μm.read more
Citations
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Journal ArticleDOI
On-chip optical isolation in monolithically integrated non-reciprocal optical resonators
Lei Bi,Juejun Hu,Peng Jiang,Dong-Hun Kim,Gerald F. Dionne,Lionel C. Kimerling,Caroline A. Ross +6 more
TL;DR: In this article, a non-reciprocal optical resonator with a small length footprint of 290 µm on a silicon-on-insulator substrate is presented, achieving unidirectional optical transmission with an isolation ratio of up to 19.5 dB near the telecommunications wavelength of 1,550 nm in a homogeneous external magnetic field.
Journal ArticleDOI
Passive technologies for future large-scale photonic integrated circuits on silicon: polarization handling, light non-reciprocity and loss reduction
TL;DR: Dai et al. as mentioned in this paper presented a novel concept for realizing a polarization splitter-rotator with a very simple fabrication process, which could allow large-scale photonic integrated circuits to be built on silicon substrates.
Journal ArticleDOI
All-optical diode in a periodically poled lithium niobate waveguide
TL;DR: In this article, a guided-wave all-optical diode based on engineered quasiphase matching in a LiNbO3 channel waveguide was demonstrated, leading to optical isolation with contrasts as high as 90% at 3.1 W, in agreement with theoretical predictions.
Journal ArticleDOI
Applications of magneto-optical waveguides in integrated optics: review
Horst Dötsch,N. Bahlmann,O. Zhuromskyy,Manfred Hammer,L. Wilkens,Reinald Gerhardt,Peter Hertel,Anatoly F. Popkov +7 more
TL;DR: Magnetooptical garnets combine high Faraday rotation with low optical losses in the near infrared region where optical communication via glass?ber is established as mentioned in this paper, and they are the only materials discussed to realize non-reciprocal devices as optical isolators and circulators.
Journal ArticleDOI
Integrated Magneto-Optical Materials and Isolators: A Review
TL;DR: The background behind integration challenges, including waveguide birefringence, fabrication tolerances, garnet/semiconductor mismatch, and optimized interfaces will hopefully spark new ideas that will finally enable the realization of integrated optical isolators and circulators.
References
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Journal ArticleDOI
Integrated optical isolator based on efficient nonreciprocal radiation mode conversion
TL;DR: In this article, an integrated optical isolator based on efficient non-reciprocal conversion from a fundamental TM mode to a deep TE radiation mode away from the cutoff was demonstrated.
Journal ArticleDOI
Integrated optical isolators with sputter-deposited thin-film magnets
TL;DR: In this paper, a sputter-deposited thin-film magnet was integrated onto a waveguide isolator fabricated in magnetic thin-filament garnets, achieving an isolation ratio of 29 dB with negligible excess loss.
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Magneto‐optic channel waveguides in Ce‐substituted yttrium iron garnet
TL;DR: In this paper, the rib waveguides were successfully produced by employing a new etching technique, which is a reactive ion etching method using BCl3 gas, and they exhibited the largest non-reciprocal phase shift ever reported of 21.1 rad/cm (λ=1.55 μm).
Journal ArticleDOI
A hybrid integrated waveguide isolator on a silica-based planar lightwave circuit
Sugimoto Naoto,Hiroshi Terui,A. Tate,Y. Katoh,Y. Yamada,A. Sugita,A. Shibukawa,Yasuyuki Inoue +7 more
TL;DR: In this paper, the optical and magneto-optical properties of the prepared 45/spl deg/ NRWRs and the epitaxial films are investigated in detail, and the authors describe the assembly procedure and present optical measurement results for the hybrid integrated waveguide isolators.
Journal ArticleDOI
Analysis of polarization independent Mach-Zehnder-type integrated optical isolator
TL;DR: In this article, the authors proposed an integrated optical isolator independent of light polarization, which can be realized on structures with magnetization tangential to the propagation direction, and three geometries of non-reciprocal phase shifters are discussed and tolerances are estimated.