Topic
Star coupler
About: Star coupler is a research topic. Over the lifetime, 725 publications have been published within this topic receiving 8306 citations.
Papers published on a yearly basis
Papers
Patent•
21 Aug 1991TL;DR: In this paper, the authors proposed an N×N integrated optical interconnection scheme where two identical N×M star couplers are connected by an optical diffraction grating comprising M unequal length waveguides spaced from one another by predetermined amounts.
Abstract: An N×N integrated optical interconnection apparatus capable of switching, multiplexing, or demultiplexing a large number of input and output wavelength channels achieves low levels of crosstalk and insertion loss. Two substantially identical N×M star couplers are connected by an optical diffraction grating comprising M unequal length waveguides spaced from one another by predetermined amounts. Each coupler comprises a dielectric slab defining a free space region between two periodic arrays of waveguides, each radially directed toward a virtual focal point. The arrays are configured so that their respective foci are located at a predetermined distance away from and outside the free space region to minimize phase errors caused by mutual coupling between adjacent waveguides. Specifically, the focal point of each array connected to each star coupler may be located so that it coincides with the phase center of the other array connected to each coupler. Residual phase errors may be reduced by appropriately setting the lengths of the waveguides in the optical grating between the two star couplers. The length difference between any two adjacent waveguides in the grating is not constant throughout the grating.
301 citations
TL;DR: In this article, a planar arrangement of two linear arrays separated by a dielectric slab serving as free space region is proposed for constructing an efficient N*N star coupler with large N at optical frequencies.
Abstract: A technique for constructing an efficient N*N star coupler with large N at optical frequencies is described. The coupler is realized in free space using two arrays, each connected to N single-mode fibers. The highest efficiencies are obtained using a planar arrangement of two linear arrays separated by a dielectric slab serving as free-space region. The coupler is suitable for mass production in integrated form, with efficiencies exceeding 35%. >
180 citations
TL;DR: The designed platform, with 200 nm thick waveguide core and 700 nm interlayer gap, is compatible for active thermal tuning and applicable to realizing compact photonic devices such as arrayed waveguide gratings (AWGs).
Abstract: We design, fabricate, and demonstrate a silicon nitride (Si(3)N(4)) multilayer platform optimized for low-loss and compact multilayer photonic integrated circuits. The designed platform, with 200 nm thick waveguide core and 700 nm interlayer gap, is compatible for active thermal tuning and applicable to realizing compact photonic devices such as arrayed waveguide gratings (AWGs). We achieve ultra-low loss vertical couplers with 0.01 dB coupling loss, multilayer crossing loss of 0.167 dB at 90° crossing angle, 50 μm bending radius, 100 × 2 μm(2) footprint, lateral misalignment tolerance up to 400 nm, and less than -52 dB interlayer crosstalk at 1550 nm wavelength. Based on the designed platform, we demonstrate a 27 × 32 × 2 multilayer star coupler.
153 citations
TL;DR: The system performance of the present Fibernet experiment, which uses a 19-port transmissive star coupler, GaAIAs injection lasers and avalanche photodiodes, and incorporates bi-phase data encoding is described, and the merits and problems of linear, ring and several star configurations are compared.
Abstract: Local computer networks which communicate over copper conductors have been developed both to promote resource sharing and provide increased performance. Such networks typically operate at bandwidth-length ( Bw \circ L ) products up to a few MHz \circ km . In this paper we consider the use of fiber optics in such networks, and give a status report on a star-configured fiber optic network experiment called Fibernet which operates at a Bw \circ L product of \sim 100 MHz\circ km at a data rate of 150 Mbits/s and which in its final phases will connect up to 19 stations. We compare the merits and problems of linear, ring and several star configurations, and of active versus passive networks. The packet communication protocol is discussed and network efficiency is calculated as a function of the packet length, channel capacity and network propagation time. We describe the system performance of the present Fibernet experiment, which uses a 19-port transmissive star coupler, GaAIAs injection lasers and avalanche photodiodes, and incorporates bi-phase data encoding. Power distribution inhomogeneities, observed in the output of the transmissive star coupler's mixer rod, are explained geometric-optically.
150 citations
TL;DR: In this paper, a multiquantum-well distributed-feedback (DFB) laser array with a star coupler and optical amplifiers on the same chip is reported.
Abstract: The monolithic integration of a multiwavelength multiquantum-well distributed-feedback (DFB) laser array with a star coupler and optical amplifiers on the same chip is reported. As many as 18 individual wavelengths from a given output of the star coupler are launched into a lensed single-mode fibre.
134 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2022 | 1 |
| 2021 | 1 |
| 2020 | 4 |
| 2019 | 9 |
| 2018 | 5 |
| 2017 | 9 |