Aimed at the safety problem of the locomotive under the dynamic braking condition, analysis the influence of the coupler and buffer system. The coupler reposition methods of the large rotation angle coupler and the small rotation angle coupler under longitudinal coupler press force was compared. The influence of coupler and buffer system to the dynamics performance of locomotive was researched ...

We designed and fabricated a 2x2 tapered multimode interference coupler on silicon-oninsulator with dimensions of 12.88μm×3μm. The device keeps a 50/50 splitting ratio over a 50nm bandwidth. To our best knowledge this is the most compact 2x2 MMI demonstrated. ©2010 Optical Society of America OCIS codes: (130.3120) Integrated optics devices; (130.2790) Guided waves

Resonator-based optical circulators are fundamentally bandwidth-limited by their quality factors. We propose a new type of circulator based on directional coupling between one-way photonic chiral edge states and conventional two-way waveguides. The operational bandwidth of such circulators is tied to the bandwidth of the directional waveguide coupler and has the potential for simultaneous broad...

A novel quadrature interferometer based on Mach–Zehnder configuration and a 3 × 3 fibre coupler is presented. Measurements showing instantaneous extraction of both real and complex parts of the interferometric signal are described. The features of this quadrature interferometric platform are discussed with a focus on signal-to-noise ratio and optical power handling.

We present a vector modal solution for the evanescent coupler comprising an optical fiber and a slab waveguide. We identify the normal vector ridge modes of the device for different configurations. The dispersion characteristics and the power transmission properties of these modes are presented. Also, the effect of the proximity between the waveguides on the ridge modes is investigated.

A combined system to support simultaneous two way mutual pulse injection-seeding and active mode-locking schemes for wavelength tunable optical short pulse generation is presented. The system consists of two gain-switched Fabry-Pérot laser diodes, a bidirectional erbium-doped fiber amplifier, and a tunable optical filter and a coupler. The optical pulses generated exhibits a good stability, a h...

Refractometry is an important method for many applications in metrology, environmental monitoring, chemical and bio-medical sensing. Several types of optical fiber refractometers have been developed including those based on fiber Bragg gratings (FBGs), long period gratings (LPGs), photonics crystal fibers (PCFs), and inline interferometers [1, 2]. Yet, all these approaches require complex fabri...

1. Introduction In a symmetric multiprocessor (SMP), every processor has its own cache, and all the processors and memory modules are connected to the central interconnect, which is usually a shared bus. As the processors become faster, the central interconnect architecture of traditional SMP's impedes performance because it cannot keep up with the processors capabilities. As SMP's have hardwar...