搜索结果: 1-15 共查到“光学 Phase”相关记录37条 . 查询时间(0.14 秒)
Tight Focusing of Light Beams: Effect of Polarization, Phase, and Coherence
Tight Focusing Light Beams Effect of Polarization Phase Coherence
2013/7/3
The focusing theory of electromagnetic waves has been well developed. A scalar wave theory satisfactorily describes the focusing process for a small semi-aperture angle. However, the vectorial charact...
Partial Differential Phase Shift Keying - Theory and Motivation
Partial Differential Phase Shift Keying Theory and Motivation Optics
2012/5/29
Recently, many evidences demonstrate that partial Differential Phase Shift Keying (i.e., when the delay inside the Delay Interferometer is shorter than the symbol period) can partially compensate the ...
Synchronous phase-demodulation of concentric-rings Placido mires in corneal topography and wavefront aberrometry (theoretical considerations)
Synchronous phase-demodulation concentric-rings Placido mires corneal topography wavefront aberrometry Optics
2012/4/20
This paper presents a digital interferometric method to demodulate Placido fringe patterns. This method uses a computer-stored conic-wavefront as reference carrier. Even though, Placido mires are wide...
Ionization-induced asymmetric self-phase modulation and universal modulational instability in gas-filled hollow-core photonic crystal fibers
Ionization-induced asymmetric self-phase modulation universal modulational instability gas-filled hollow-core photonic crystal fibers Optics
2012/4/20
We study theoretically the propagation of relatively long pulses with ionizing intensities in a hollow-core photonic crystal fiber filled with a Raman-inactive gas. Due to photoionization, previously ...
Experimental phase-space-based optical amplification of scar modes
Experimental phase-space-based optical amplification scar modes Optics
2012/4/20
Waves billiard which are chaotic in the geometrical limit are known to support non-generic spatially localized modes called scar modes. The interaction of the scar modes with gain has been recently in...
Topological-phase effects and path-dependent interference in microwave structures with magnetic-dipolar-mode ferrite particles
Topological-phase effects path-dependent interference microwave structures magnetic-dipolar-mode ferrite particles
2012/4/19
Different ways exist in optics to realize photons carrying nonzero orbital angular momentum. Such photons with rotating wave fronts are called twisted photons. In microwaves, twisted fields can be pro...
Efficient and flexible generation of entangled qudits with cross-phase modulation
Efficient flexible generation entangled qudits cross-phase modulation
2013/7/3
In this paper, we provide a simple but powerful module to generate entangled qudits. This module, assisted with cross-Kerr nonlinearity, is flexible for generation of entangled qudits with arbitrary d...
Perfect lensing with phase conjugating surfaces: Towards practical realization
Perfect lensing conjugating
2011/9/5
It is theoretically known that a pair of phase conjugating surfaces can function as a perfect lens,focusing propagating waves and enhancing evanescent waves. However, the known experimental approaches...
Offset frequency dynamics and phase noise properties of a self-referenced 10 GHz Ti:sapphire frequency comb
Offset frequency dynamics phase noise properties self-referenced 10 GHz sapphire frequency comb
2011/8/11
Abstract: This paper shows the experimental details of the stabilization scheme that allows full control of the repetition rate and the carrier-envelope offset frequency of a 10 GHz frequency comb bas...
Boson origin of superconducting phase
Boson origin superconducting phase magnetic vector potential
2011/8/4
Abstract: London presented a relation between suppercurrent density and magnetic vector potential [1], Pippard suggested a non-local relation [2], and the similar relation can be derived with the BCS ...
The spinorial representation of polarized light and Berry phase
The spinorial representation polarized light Berry phase
2011/8/3
Abstract: From relativistic point of view it has been shown here that a polarized photon can be visualized to give an equivalent spinorial description when the two-component spinor is the eigenvector ...
Low phase noise diode laser oscillator for 1S-2S spectroscopy in atomic hydrogen
Low phase noise diode laser oscillator 1S-2S spectroscopy atomic hydrogen
2011/8/16
Abstract: We report on a low-noise diode laser oscillator at 972 nm actively stabilized to an ultra-stable vibrationally- and thermally compensated reference cavity. To increase the fraction of laser ...
An Optical Fibre Pulse Rate Multiplier for Ultra-low Phase-noise Signal Generation
Optical Fibre Ultra-low Phase-noise Signal
2011/9/6
In this letter we report on an all optical-fibre approach to the synthesis of ultra-low noise microwave signals by photodetection of femtosecond laser pulses. We use a cascade of Mach-Zehnder fibre in...
Theoretical study of Acousto-optical coherence tomography using random phase jumps on US and light
Acousto-optical random phase jumps coherence tomography
2011/9/6
Acousto-Optical Coherence Tomography (AOCT) is variant of Acousto Optic Imaging (called also ultrasonic modulation imaging) that makes possible to get z resolution with acoustic and optic Continuous W...
Paraxial theory of sum-frequency generation by side-walk alignment and phase-matching in uniaxial crystals
non-linear optics, birefringence, sum-frequency generation
2011/9/5
A formalism in terms of Hertz potentials is presented describing sum-frequency generation in a uniaxial non-linear crystal. A scheme is proposed consisting in aligning the side-walk propagation of ext...