Photonic crystal waveguides with semi-slow light and tailored dispersion properties

Frandsen, Lars Hagedorn; Lavrinenko, Andrei V.; Fage-Pedersen, Jacob; Borel, Peter Ingo

doi:10.1364/oe.14.009444

Cited by 395 publications

(251 citation statements)

References 16 publications

Supporting

Mentioning

233

Contrasting

Unclassified

Order By: Relevance

“…Due to the effects on pulse broadening, much attention has been devoted to finding structures with low group velocity dispersion in the slow-light regime. 30,31 Interestingly, our analysis reveals that such structures have the additional benefit of reducing the minimum attainable group velocity. Indeed, in the limit of vanishing GVD our analysis shows that the group velocity attains the ideal value of zero provided that any higher-order dispersion is negligible.…”

Section: Limits Of Slow Light In Photonic Crystalsmentioning

confidence: 82%

Limits of slow light in photonic crystals

2008

View full text Add to dashboard Cite

While ideal photonic crystals would support modes with a vanishing group velocity, state-of-the art structures have still only provided a slow-down by roughly two orders of magnitude. We find that the induced density of states caused by lifetime broadening of the electromagnetic modes results in the group velocity acquiring a finite value above zero at the band gap edges, while attaining superluminal values within the band gap. Simple scalings of the minimum and maximum group velocities with the imaginary part of the dielectric function or, equivalently, the linewidth of the broadened states, are presented. The results obtained are entirely general and may be applied to any effect which results in a broadening of the electromagnetic states, such as loss, disorder, finite-size effects, etc. This significantly limits the reduction in group velocity attainable via photonic crystals.

show abstract

Section: Limits Of Slow Light In Photonic Crystalsmentioning

confidence: 82%

Limits of slow light in photonic crystals

2008

View full text Add to dashboard Cite

show abstract

“…The group velocity V g and group velocity dispersion (GVD) parameter β 2 of light with frequencies and wavenumbers k in an optical waveguide can be written as [14][15][16]:…”

Section: Time-division-multiplexer (Tdm) System Design Modelingmentioning

confidence: 99%

“…Photonic crystal waveguide (PCW) application with slow light properties have been widely discussed [16][17][18][19][20][21][22][23][24][25][26] in the recent years. Slow light becomes possible to control the speed of light and can be applied to a great variety of applications, such as delay lines that control the arrival of optical signals and optical buffers.…”

Section: Time-division-multiplexer (Tdm) System Design Modelingmentioning

confidence: 99%

“…Figure 3 shows that the dynamic group velocity tuning with different wavenumbers or frequencies is feasible. Frandsen et al [16] also showed that perturbing the hole adjacent can increase the waveguide bandwidth by changing the hole size of the first two rows. As shown in Figure 4, we can get the relation between the group velocity and the normalized frequency by changing r 1 and r 2 , respectively.…”

Section: Time-division-multiplexer (Tdm) System Design Modelingmentioning

confidence: 99%

See 1 more Smart Citation

New Design of All-Optical Slow Light TDM Structure Based on Photonic Crystals

Wu¹

2014

PIER

View full text Add to dashboard Cite

Abstract-This work demonstrates an all-optical slow light Time Division Multiplexing (TDM) structure based on photonic crystals (PCs). The structure shows good ability of dividing time domain signal into repetition time slots signal by four tunable group velocity waveguides from 0.006 * c to 0.248 * c where c is the velocity of light in the vacuum at the center wavelength of 1550 nm and over a bandwidth 4.52 THz with group velocity dispersion below 10 2 ps 2 /km. New high efficiency Y-type directional coupling output can get larger than ∼1.4 times intensity and ∼93% loss improvement which are comparable to conventional output device. The proposed PCs waveguide structure is leading the way to achieve the TDM application and has good capability to extend the application of the optical communication and optical fiber sensors systems.

show abstract

“…23,24 In the following, all dispersion curves and complex field amplitudes E(r) are calculated using the freely available MIT photonics band (MPB) code, 25 whereas the propagation loss α(S) is estimated with a model based on the code for loss engineering developed in Ref. 14.…”

Section: Srs In Realistic Phc Waveguidesmentioning

confidence: 99%

Scaling of Raman amplification in realistic slow-light photonic crystal waveguides

et al. 2011

View full text Add to dashboard Cite

The prospect for low pump-power Raman amplification in silicon waveguides has recently been boosted by theoretical studies discussing the enhancement of nonlinear phenomena in slow-light structures. In principle, the slowing down of either the pump or the signal beam is equivalent in terms of Raman gain, but in the presence of losses, we show that they play different roles in determining the net signal gain. We also investigate the impact of the mode profile in realistic slow-light waveguides on the total gain, an effect that is usually neglected in the context of stimulated Raman scattering. By taking representative losses and mode shapes into account, we provide a realistic estimation of the achievable performance of slow-light photonic crystal waveguides.

show abstract

Photonic crystal waveguides with semi-slow light and tailored dispersion properties

Cited by 395 publications

References 16 publications

Limits of slow light in photonic crystals

Limits of slow light in photonic crystals

New Design of All-Optical Slow Light TDM Structure Based on Photonic Crystals

Scaling of Raman amplification in realistic slow-light photonic crystal waveguides

Contact Info

Product

Resources

About