Improved design of magnetooptic rib waveguides for optical isolators

Bahlmann, N.; Chandrasekhara, V.; Erdmann, Andreas; Gerhardt, R.; Hertel, P.; Lehmann, R.; Salz, D.; Schroteler, F.-J.; Wallenhorst, M.; Dötsch, H.

doi:10.1109/50.669010

Cited by 54 publications

(26 citation statements)

References 23 publications

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“…6,8,9 Mostly, magneto-optic materials such as YIG and BIG ͑Bismuth Iron Garnet͒ have been used due to their large magneto-optic response. The large lattice mismatch between these materials and integrated photonic platforms such as Si and InP precluded their applicability for photonic integrated circuits.…”

Section: Optical Isolator Applicationmentioning

confidence: 99%

Surface plasmon isolator based on nonreciprocal coupling

Montoya

Parameswaran

Hensley

et al. 2009

Journal of Applied Physics

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Extremely high efficient coupling between long range surface plasmon polariton and dielectric waveguide mode Appl. Phys. Lett. 95, 091104 (2009); 10.1063/1.3212145Vertical coupling between short range surface plasmon polariton mode and dielectric waveguide mode Integrated photonics require optical isolators that achieve low insertion loss and large optical isolation. Here we describe a surface plasmon enhanced optical isolator based on nonreciprocal coupling from a dielectric waveguide coupled to a surface plasmon waveguide. The surface plasmon core consists of a magnetic metal which results in a large nonreciprocity, allowing for device lengths on the order of 50 m. The analysis and modeling presented here indicate that greater than 30 dB isolation and less than 3 dB insertion loss are possible.

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Section: Optical Isolator Applicationmentioning

confidence: 99%

Surface plasmon isolator based on nonreciprocal coupling

Montoya

Parameswaran

Hensley

et al. 2009

Journal of Applied Physics

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“…Such materials are available with present-day technology. 11,12 In this experiment, a nonreciprocal phase shift for BiLu-IG rib waveguides is characterized with a fiber MachZehnder interferometer. The phase shifts obtained from the interferometer have a linear relationship with length, as expected, and match well with the theoretical model of thickness dependence on ⌬␤.…”

Section: Observation Of Optical Isolation Based On Nonreciprocal Phasmentioning

confidence: 99%

“…Using a sufficiently large nonreciprocal phase shift in an interferometer would also allow actual observation of isolator functionality. So far, measurements of nonreciprocal phase shift on rib waveguides have relied on observing changes in polarization states 10,11 or different mode profiles 12 for various input polarization states. These methods require careful polarization controls and need to scan input polarization states.…”

Section: Observation Of Optical Isolation Based On Nonreciprocal Phasmentioning

confidence: 99%

Observation of optical isolation based on nonreciprocal phase shift in a Mach–Zehnder interferometer

Fujita

Levy

Ahmad

et al. 1999

Applied Physics Letters

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Measurements up to 45° nonreciprocal phase shift using the transverse magneto-optical effect have been made in a hybrid Mach–Zehnder waveguide/fiber interferometer. BiLu-IG waveguides of various thicknesses and lengths have been used to study the length and thickness dependence of the effect at λ=1.55 μm. This interferometric scheme is also employed to observe optical isolation; an extinction ratio of 11 dB is obtained for the 45° nonreciprocal phase shift, in agreement with theoretical predictions.

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“…This is comparable in magnitude to that obtained due to a dc magnetic field (1 ∼ 1.5 rad/mm). 17,21) Hence, it can be expected that the phase shift induced by MSSW can be used for design of practical optical signal processing devices.…”

Section: Estimation Of Optical Phase Shiftmentioning

confidence: 99%

High-Speed Nonreciprocal Optical Switching Using Phase Shift Induced by Magnetostatic Surface Waves

Bhandari¹,

Miyazaki²

2001

Jpn. J. Appl. Phys.

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Interaction between optical guided waves and magnetostatic waves (MSW) has great potential for wideband optical signal processing directly at microwave signal frequencies. However, till now, all theoretical and experimental investigation has focused on optical mode conversion involving a change in polarization induced by magnetostatic waves. So far, the efficiency of this mode conversion has been low. Here, we propose and analyze, for the first time, the feasibility of obtaining an optical phase shift induced by magnetostatic surface waves in thin film waveguides. We show that with proper selection of the waveguide parameters, it is possible to obtain a phase shift which is sufficient for design of efficient optical-MSW signal processing devices. Further, we propose and analyze a device structure for an optical switch based upon this phase shift and demonstrate the design feasibilty through a numerical example.

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Improved design of magnetooptic rib waveguides for optical isolators

Cited by 54 publications

References 23 publications

Surface plasmon isolator based on nonreciprocal coupling

Surface plasmon isolator based on nonreciprocal coupling

Observation of optical isolation based on nonreciprocal phase shift in a Mach–Zehnder interferometer

High-Speed Nonreciprocal Optical Switching Using Phase Shift Induced by Magnetostatic Surface Waves

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