Cascaded Optical Buffer Based on Nonlinear Polarization Rotation in Semiconductor Optical Amplifiers

Cheng, Ming; Wu, Chongqing; Lü, Hua

doi:10.1088/0256-307x/25/11/052

Cited by 25 publications

(3 citation statements)

References 12 publications

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“…Note that here we have chosen the Coulomb pseudopotential μ * = 0.10 as polyvalent metals [40]. The small λ e−ph again confirms the weak electron-phonon coupling mechanism, which is severely contrary to that of LaFeAsO 0.9 F 0.1−Δ [40]. The NQR experiment [14] and specific heat measurement [41,42] have proposed the weak coupling conventional SC in Ni-based superconductors.…”

Section: Resultsmentioning

confidence: 74%

“…we will obtain λ e−ph 0.41, comparable with that of single elemental superconductors like Mo(T c = 0.92 K, λ = 0.41) [39]. Note that here we have chosen the Coulomb pseudopotential μ * = 0.10 as polyvalent metals [40]. The small λ e−ph again confirms the weak electron-phonon coupling mechanism, which is severely contrary to that of LaFeAsO 0.9 F 0.1−Δ [40].…”

Section: Resultsmentioning

confidence: 76%

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Kramers non-magnetic superconductivity inLnNiAsO superconductors

Luo

Liu

et al. 2014

J. Phys.: Condens. Matter

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We investigated a series of nickel-based oxyarsenides LnNiAsO (Ln=La, Ce, Pr, Nd, Sm) compounds. CeNiAsO undergoes two successive anti-ferromagnetic transitions at TN1=9.3 K and TN2=7.3 K; SmNiAsO becomes an anti-ferromagnet below TN≃3.5 K; NdNiAsO keeps paramagnetic down to 2 K but orders anti-ferromagnetically below TN≃1.3 K. Superconductivity was observed only in Kramers non-magnetic LaNiAsO and PrNiAsO with Tc=2.7 K and 0.93 K, respectively. The superconductivity of PrNiAsO is further studied by upper critical field and specific heat measurements, which reveal that PrNiAsO is a weakly coupled Kramers non-magnetic superconductor. Our work confirms that the nickel-based oxyarsenide superconductors are substantially different in mechanism to iron-based ones, and are likely to be described by the conventional superconductivity theory.

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Section: Resultsmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 76%

Kramers non-magnetic superconductivity inLnNiAsO superconductors

Luo

Liu

et al. 2014

J. Phys.: Condens. Matter

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“…They proved extinction ratio increased 8dB contrast all-optical AND gate base on cross-gainmodulation. Due to the polarization rotation can induce the variety of output power, the polarization rotation combining other non-linearity effect can use in all-optical nonlinear regeneration [9] and all-optical sampling [10] and optical buffer [11] and optical data comparator [12]. Recently, with investigate deeply, the applications of SOA nonlinear polarization rotation at high-speed all-optical signal processing and all-optical logic are more and more widespread along with research deeply [13,14].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Polarization Rotation Characteristic Phenomenon in a Bulk Semiconductor Optical Amplifier

Feng¹,

Ji²,

Zhang³

2013

OPJ

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The phenomena of polarization rotation induced by self-modulation in semiconductor optical amplifier (SOA) are analyzed theoretically. The relationship between polarization parameters and gain as well as phase is obtained by the correlation parameter of ellipse polarization and SOA nonlinearity polarization rotation theory. The experiment employs polarizer drive by walking electromotor and power meter, the light power of 360 degree is measured. The transformation law of output polarization power components is found for obvious polarization rotation in the selected coordinate axes based on connection of polarization state in difference axes. Using this law make the manipulation easily on getting ideal polarization state. It can offer a fine method to realize all-optical switch and other logic elements in experiment. This work is of great significance for the applications of SOA nonlinear polarization rotation at high-speed all-optical signal processing and all-optical logic gate.

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Developments and Perspectives of Iron‐based High‐Temperature Superconductors

Wen¹

2008

Advanced Materials

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Since the first report on superconductivity at 26 K in F‐doped LaOFeAs at the end of February 2008, the superconducting transition temperature has been quickly raised to about 55 K and many new superconductors have been found, and superconductors with a higher condensing temperature are expected in this system. In this brief Research News article, the author will relate the enormous interest that has been generated towards new superconductor exploration, the refinement and tailoring of the single phase of the available superconductors, the growth of single crystals, and the theoretical and experimental efforts toward targeting the mechanism. Finally, a preliminary comparison between the iron‐based system and the cuprates is given, as well as perspectives on these new iron‐based superconductors.

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Cascaded Optical Buffer Based on Nonlinear Polarization Rotation in Semiconductor Optical Amplifiers

Abstract: A cascaded buffer based on nonlinear polarization rotation in semiconductor optical amplifiers is proposed, which is suitable for fast reconfiguration of buffering time at picoseconds. With the proposed buffer, sixty different buffer times are demonstrated at 2.5 Gb/s.

Cited by 25 publications

References 12 publications

Kramers non-magnetic superconductivity inLnNiAsO superconductors

Kramers non-magnetic superconductivity inLnNiAsO superconductors

Nonlinear Polarization Rotation Characteristic Phenomenon in a Bulk Semiconductor Optical Amplifier

Developments and Perspectives of Iron‐based High‐Temperature Superconductors

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