All optical modulator based on silicon resonator

Pinhas, Hadar; Bidani, Liron; Baharav, Oded; Sinvani, M.; Danino, Meir; Zalevsky, Zeev

doi:10.1117/12.2186781

Cited by 4 publications

(2 citation statements)

References 15 publications

(16 reference statements)

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“…6. The probe wavelength is tuned to give the maximum transmission according to the resonance spectrum [23]. At time t = 0, the pump pulse illuminates the Si slab and FCCs are generated and thus the pump attenuates the probe transmission.…”

Section: Resultsmentioning

confidence: 99%

Experimental characterization towards an in-fibre integrated silicon slab based all-optical modulator

Pinhas

Danan

Sinvani

et al. 2017

J. Eur. Opt. Soc.-Rapid Publ.

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Background: Due to the industrially increasing interest in optics communication the field of all-optical modulation is becoming more and more popular. However, no in-fibre integrated miniaturized devices which provide current solutions were suggested as all-optical modulators with sufficient modulation depth and with low power consumption. Methods: In this paper, an all-optical silicon modulator with improved modulation depth is presented. The modulator will be developed as an in-fibre device for optics communication applications. The modulator is a silicon slab, 50 and 470 μm thick which is coated on both sides to get an improved Fabry-Perot resonator for laser beam at wavelength of 1550 nm. The modulator operation is based on the plasma dispersion effect which is induced by a pulsed visible laser beam acting as the pump for the creation of free charge carriers. Results: We have proved the coating withstands high energy fluency of the laser pulse. The different recombination and heat processes are examined. Our silicon based Fabry-Perot resonator increases the intrinsic c-Si finesse to 30. The improved finesse is shown to have significant effect on the modulation depth up to 12 dB. Conclusions: To the best of our knowledge this is the first experimental feasibility study of an all-optical modulator with sufficient modulation depth and with low power consumption which is also an in-fibre integrated miniaturized device based upon Si slab. Extensive experimental and numerical studies presented in this paper examine the influence of thermal effects and the sample parameters on the response time and on the modulation depth and the power consumption of the in-fibre integrated device. Apart from being a modulator, the proposed device can also act as tunable spectral filter.

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Section: Resultsmentioning

confidence: 99%

Experimental characterization towards an in-fibre integrated silicon slab based all-optical modulator

Pinhas

Danan

Sinvani

et al. 2017

J. Eur. Opt. Soc.-Rapid Publ.

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“…Some of these devices implementation has been suggested as ring resonators and have been implemented with Silicon-OnInsulator (SOI) [4][5][6]. The IIR resonator implementation as a filter is only one among many implemented applications [7][8][9][10][11]. Such applications are often used for spectral ranges around 1530-1565 nm which is defined as the Cband.…”

Section: Introductionmentioning

confidence: 99%

Design of fiber-integrated tunable thermo-optic C-band filter based on coated silicon slab

Pinhas

Malka

Danan

et al. 2017

J. Eur. Opt. Soc.-Rapid Publ.

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Background: Optical filters are required to have narrow band-pass filtering in the spectral C-band for applications such as signal tracking, sub-band filtering or noise suppression. These requirements lead to a variety of filters that offer thermo-optic effect for optical switching, however, some of which without proper thermal and optical efficiency. Methods: In this paper we propose a tunable thermo-optic filtering device based on a coated silicon slab resonator with an increased Q-factor to allow for an efficient thermo-optical switching in the C-band. The device can be designed either for long range wavelength tuning or for short range with increased wavelength resolution. Results: Theoretical examination of the thermal parameters affecting the filtering process is shown together with experimental results. Proper channel isolation with an extinction ratio of 20 dB is achieved with a spectral bandpass width of 0.07 nm. Conclusions: This Si slab based filter characteristics make it suitable for wavelength switching systems such as dense wavelength division multiplexing. In addition, the filter is fiber integrated in order for it to be more compatible with other optics communication devices.

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