A<b>2×2</b>multimode interference coupler with exponentially tapered waveguide

Wu, Jijiang; Shi, Bangren; Kong, Mei

doi:10.1080/09500340601155183

Cited by 2 publications

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different types of taper have been developed targeted at specific applications on the platform of silicon. [32][33][34][35][36][37] In the AWG design, using adiabatic tapers is also an effective approach to reduce the mode mismatch between the FPR and the arrayed waveguides. Compact parabolic tapers [13] and doubleetch tapers [38] have been demonstrated in an AWG to reduce the excess loss and receiver crosstalk.…”

Section: Optimized Curved Tapersmentioning

confidence: 99%

Ultra‐Low‐Crosstalk Silicon Arrayed‐Waveguide Grating (De)multiplexer with 1.6‐nm Channel Spacing

Shen,

Li,

Zhao

et al. 2023

Laser & Photonics Reviews

View full text Add to dashboard Cite

A silicon arrayed‐waveguide grating (AWG) with 1.6‐nm channel spacing is proposed and realized with high performances for dense wavelength‐division (de)multiplexing systems. For the present AWG, the arrayed waveguides are broadened uniformly to be far beyond the singlemode regime, so that random phase errors and propagation loss are minimized even without any additional requirement for the fabrication process. Particularly, Euler‐bends are introduced for the arrayed waveguides to shrink the device footprint and suppress any excitation of higher‐order modes. As an example, a 16 × 16 AWG (de)multiplexer is realized with a compact footprint of 600 × 800 µm2 by using single‐etched 220‐nm‐thick silicon photonic waveguides. When using the fabricated AWG to demultiplex the channels launched from the central input port, the excess loss and the adjacent‐channel crosstalk of the central output port are ≈2.2 and ≈−31.7 dB, respectively. Such an AWG is one of the best among silicon implementations.

show abstract

Section: Optimized Curved Tapersmentioning

confidence: 99%

Ultra‐Low‐Crosstalk Silicon Arrayed‐Waveguide Grating (De)multiplexer with 1.6‐nm Channel Spacing

Shen,

Li,

Zhao

et al. 2023

Laser & Photonics Reviews

View full text Add to dashboard Cite

show abstract

“…when the potential modulation period is twice the mean residence time of the noise-driven particle. Experimental works on stochastic resonance are almost exclusively using amplitude modulation going along with additive amplitude noise or multiplicative amplitude noise [10,20,37,44,45]. In this case, it corresponds to a pure one dimensional effect.…”

mentioning

confidence: 99%

Phase Stochastic Resonance in a forced nanoelectromechanical oscillator

Chowdhury

Barbay

Clerc

et al. 2018

Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF)

View full text Add to dashboard Cite

Stochastic resonance is a general phenomenon usually observed in one-dimensional, amplitude modulated, bistable systems.We show experimentally the emergence of phase stochastic resonance in the bidimensional response of a forced nano-electromechanical membrane by evidencing the enhancement of a weak phase modulated signal thanks to the addition of phase noise. Based on a general forced Duffing oscillator model, we demonstrate experimentally and theoretically that phase noise acts multiplicatively inducing important physical consequences. These results may open interesting prospects for phase noise metrology or coherent signal transmission applications in nanomechanical oscillators. Moreover, our approach, due to its general character, may apply to various systems.Stochastic resonance whereby a small signal gets amplified resonantly by application of external noise has been introduced originally in paleoclimatology [1,19] to explain the recurrence of ice ages and has then been observed in many other areas including neurobiology [6,16], electronics [18], mesoscopic physics [25], photonics [4, 32], atomic physics [43] and more recently mechanics [3,33,34,42]. Implementation of stochastic resonances involves generally three ingredients : (i) the existence of metastable states separated by an activation energy, as in excitable or bistable nonlinear systems, (ii) a coherent excitation, whose amplitude is however too weak to induce deterministic hopping between the states, and (iii) stochastic processes inducing random jumps over the potential barrier. In the classical picture of a bistable system, this corresponds to the motion of a fictive particle in a double-well potential periodically modulated in amplitude by the signal and subjected to noise [21]. When an optimal level of noise is reached, the system's response power spectrum displays a peak in the signal to noise ratio, unveiling the stochastic resonance phenomenon. The resonance occurs as a 'bona-fide' resonance in a frequency band around a signal frequency approximately given by the time-matching condition [5,22], i.e. when the potential modulation period is twice the mean residence time of the noise-driven particle. Experimental works on stochastic resonance are almost exclusively using amplitude modulation going along with additive amplitude noise or multiplicative amplitude noise [10,20,37,44,45]. In this case, it corresponds to a pure one dimensional effect. Few studies take advantage of a bidimensional phase space by e.g. using phase modulation and/or phase noise (i.e. phase random fluctuations of input signal) [15,23]. Most of them use amplitude noise to demonstrate amplitude stochastic resonance, or introduce noise in the form of the response of a stochastic oscillator [39]. However in the latter scheme, neither the noise nor the modula-tion are controlled, thus preventing to unveil the specific roles of phase modulation and phase noise in stochastic resonance.In this Letter, stochastic resonance is implemented in a nonlinear nanomechanical oscillator f...

show abstract

A2×2multimode interference coupler with exponentially tapered waveguide

Cited by 2 publications

References 12 publications

Ultra‐Low‐Crosstalk Silicon Arrayed‐Waveguide Grating (De)multiplexer with 1.6‐nm Channel Spacing

Ultra‐Low‐Crosstalk Silicon Arrayed‐Waveguide Grating (De)multiplexer with 1.6‐nm Channel Spacing

Phase Stochastic Resonance in a forced nanoelectromechanical oscillator

Contact Info

Product

Resources

About