Increasing Tolerance in Passive Integrated Optical Polarization Converters

Tol, J.J.G.M. van der; Felicetti, M.; Smit, M.K.

doi:10.1109/jlt.2012.2204039

Cited by 12 publications

(10 citation statements)

References 12 publications

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“…Unfortunately, fabrication errors smaller than 50 − 100nm 7,14 in the transversal geometry of the rotator waveguide are required to meet this condition, complicating the realization of waveguide polarization rotator with high P CE.…”

Section: Conventional Waveguide Polarization Rotatorsmentioning

confidence: 99%

A general approach for robust integrated polarization rotators

Alonso-Ramos

Halir

Ortega‐Moñux

et al. 2013

Integrated Optics: Physics and Simulations

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Integrated polarization rotators suffer from very high sensitivity to fabrication errors. A polarization rotator scheme that substantially increases fabrication tolerances is proposed. In the proposed scheme, two tunable polarization phase shifters are used to connect three rotator waveguide sections. By means of properly setting the polarization phase shifters, fabrication errors are compensated and perfect polarization rotation is achieved. Analytical conditions are shown that determine the maximum deviation that can be corrected with the proposed scheme. A design example is discussed, where the thermo-optic effect is used to provide the required tunable polarization phase shifting. Calculated 40dB extinction ratio is shown in presence of fabrication errors that would yield a 4dB extinction ratio in the conventional approach.

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Section: Conventional Waveguide Polarization Rotatorsmentioning

confidence: 99%

A general approach for robust integrated polarization rotators

Alonso-Ramos

Halir

Ortega‐Moñux

et al. 2013

Integrated Optics: Physics and Simulations

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“…However, so far a reliable integrated PC has been lacking. A number of proposals have been made for TE/TM converters [2]- [10]. The most promising of these to be integrated in photonic circuits seem to be the sloped sidewall single section PCs, which are the shortest and have a relatively easy fabrication.…”

Section: Introductionmentioning

confidence: 99%

“…In [10] a new two section PC was proposed, with a much improved tolerance and consequently with a high conversion. This device has been experimentally demonstrated [11].…”

Section: Introductionmentioning

confidence: 99%

Integrated High-Performance TE/TM Converters for Polarization Independence in Semiconductor Optical Amplifiers

Felicetti

Tol

Geluk

et al. 2015

J. Lightwave Technol.

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Integrated polarization converters (PCs) with high (>99%) conversion efficiency open up many new possibilities in an InP-based photonic integrated circuit. In this paper, we describe how such a PC can be added to a circuit containing semiconductor optical amplifiers (SOAs), in order to obtain polarization independent amplification. Polarization independence is obtained by placing the PC halfway between two identical SOA sections. This approach has the advantage that no compromises in design and fabrication are needed. The polarization conversion is found to be very high, above 99.5%, when using a tolerant two-section PC. The extra insertion loss due to the converter is below 0.5 dB. The polarization-dependent gain (PDG) of the SOA reduces from 17 dB to only 0.3 dB by the inclusion of the PC. This is comparable to the best PDG values found in the literature with other techniques. The reduction is achieved over the whole C-band and for varying pump currents.

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“…1(c)], we can find the lengths of the sections at which the error of defining the top width in one section compensates the error of the top width in the other section. So the tolerance improves [9].…”

mentioning

confidence: 99%

“…1(a)]. A new concept was recently suggested to increase the fabrication tolerances using two trapezoidal sections [9]. Following the concept, we made and characterized the two-section polarization converters.…”

mentioning

confidence: 99%

Tolerant polarization converter for InGaAsP-InP photonic integrated circuits

2013

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We report the fabrication and characterization of a new polarization converter for InGaAsP-InP photonic integrated circuits. The converter consists of two right trapezoidal sections with the angled sidewalls etched wetly. The converters show a greatly improved tolerance to variations of the fabrication, an averaged efficiency of polarization conversion of 99.8% and a loss of about 0.7 dB at a wavelength of 1.535 μm.

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Increasing Tolerance in Passive Integrated Optical Polarization Converters

Cited by 12 publications

References 12 publications

A general approach for robust integrated polarization rotators

A general approach for robust integrated polarization rotators

Integrated High-Performance TE/TM Converters for Polarization Independence in Semiconductor Optical Amplifiers

Tolerant polarization converter for InGaAsP-InP photonic integrated circuits

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