Dynamic Gain Equalizer Using Proposed Adjustment Procedure for Thermooptic Phase Shifters Under the Influence of Thermal Crosstalk

Maru, Koichi; Tanaka, Kenichi; Chiba, T.; Nonen, H.; Uetsuka, Hiroshi

doi:10.1109/jlt.2004.829214

Cited by 24 publications

(8 citation statements)

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“…Nevertheless, the scaling of this technique is limited by a maximum achievable phase shift, time constant, and other electrical design parameters. Three-dimensional trenches were used to reduce the thermal crosstalk while maintaining a smaller chip size [19]. However, such designs are customized and furthermore, the use of an external heat sink restricts its feasibility on the standard CMOS process.…”

Section: Introductionmentioning

confidence: 99%

Design and Simulation of Thermo-Optic Phase Shifters With Low Thermal Crosstalk for Dense Photonic Integration

Das

Varshney

et al. 2020

IEEE Access

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We investigate and demonstrate the thermal crosstalk problem in integrated photonic circuits with metal and silicon doped heaters. Further, we illustrate that due to the localized heating effect, integrated doped heaters are out-performed in terms of thermal crosstalk as compared to integrated metal heaters. To mitigate thermal crosstalk and enhance phase tuning efficiency further, a CMOS compatible air-filled trench region is realized between the doped heater and the adjacent element. The performances of three fundamental building blocks of integrated photonic circuits, namely, a PN phase shifter, an optical attenuator, and a ring resonator, are tested by full-wave thermal, charge, and optical simulations. Additionally, the impact of thermal crosstalk on the performance of integrated PN phase shifters and optical attenuators is examined thoroughly. The proposed low crosstalk thermal phase shifters might be very beneficial for densely routed complex integrated photonic circuits like photonic transceivers for data centers, optical phased array antennas, and photonic reservoirs. INDEX TERMS Silicon on insulator (SOI), thermal crosstalk, phase shifter, integrated doped heaters, integrated optical attenuator, thermal switch, ring resonator.

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Section: Introductionmentioning

confidence: 99%

Design and Simulation of Thermo-Optic Phase Shifters With Low Thermal Crosstalk for Dense Photonic Integration

Das

Varshney

et al. 2020

IEEE Access

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“…The optical path length of the interferometer can be drastically reduced by using an optical waveguide chip, in which several optical elements are arranged on a planar surface of a silica or silicon substrate, instead of bulk optical system. The optical waveguide chip can be fabricated based on planar lightwave circuit (PLC) technology [19][20][21] that has been widely used for optical passive devices deployed for optical communication systems. Details will be discussed on the Conference.…”

Section: Prospects For Compact and Low-cost Systemmentioning

confidence: 99%

Precision and Compact Dynamic Bending Tester

Maru

Fujii

2008

2008 International Conference on Computer and Electrical Engineering

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A method for precision force measurement by using the levitation mass method (LMM) is reviewed. In this method, a mass levitated using a pneumatic linear bearing with sufficiently small friction is made to collide with the object being tested, and the instantaneous value of the impact force is measured as the inertial force acting on the mass. The velocity and acceleration of the mass are measured using an optical interferometer. With this method, the relative combined standard uncertainty is estimated to be very small. The prospects for reducing the size and cost of the optical interferometer are also discussed.

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“…The optical signal in BA's (Booster Amplifier) input and output are monitored [5][6] [7]. We analyze the wavelength power data gathered from these two points to control DCE and DGE (Dynamic Gain Equalizer) to realize equalization [8].…”

Section: System Working Principlesmentioning

confidence: 99%