Charles Burger, Md, is the Medical Director of Evergreen Woods Primary Care (a Martin’s Point Health Care associate) in Bangor, ME. E-mail: [email protected]. In the Summer 2009 issue of The Permanente Journal, Lawrence Weed, MD, outlined the philosophy behind the development of the problemoriented medical record and the subsequent development of the clinical decision tool calle...

Polarization-maintaining photonic crystal fiber couplers (PM-PCFCs) were fabricated using a CO2 laser irradiation technique. We could control the states of air holes in the tapered region of couplers by adjusting the laser power density in the fusion and the elongation processes. It was demonstrated that the air hole remaining PM-PCFC exhibited polarization-splitting characteristics and that th...

We demonstrate planar Si3N4 ring resonators with ultra-high quality factors (Q) of 19 million, 28 million, and 7 million at 1060 nm, 1310 nm, and 1550 nm, respectively. By integrating the ultra-low-loss Si3N4 ring resonators with laterally offset planar waveguide directional couplers, optical add-drop and notch filters are demonstrated to have ultra-narrow bandwidths of 16 MHz, 38 MHz, and 300 ...

Cascaded second-order nonlinear effects attract great interest because of their potential use in devices that require nonlinear (NL) phase shifts. – 9 It is only recently that the case of x s2d distributed couplers in the cascading regime has been considered. The nonlinear effect studied in Ref. 10 is second-harmonic generation, for which only the fundamental frequency field (at v) is incident ...

Introduction Variation of the B1 field distribution at high field causes variation of the flip angles inside the patient’s body which leads to shading in the acquired images. Numerous methods have been proposed to mitigate B1 inhomogeneity. More recently, it was shown that “B1 shimming” can be performed using multiple transmitters [1,2], but utilizing these additional transmit channels effectiv...

A novel method for100Gbpsall-optical OFDM using Discrete Cosine Transform in a Radio-Over-Fiber link is proposed. The system is designed simply using both symmetric and asymmetric passive optical couplers. DCT is achieved all-optically by adjusting the length and splitting ratio of the couplers. The performance of the system is compared with all-optical OFDM based on Discrete Fourier, Discrete ...

The subject of this thesis is the design, analysis, fabrication, and characterization of integrated Bragg grating optical filters. We begin by describing the design and analysis of three essential building blocks needed for integrated Bragg grating filters: waveguides, directional couplers and Bragg gratings. Next, we describe and implement a flexible fabrication methodology for building integr...

We propose a procedure for transferring the state a microwave qubit via a transmission line from one resonator to another resonator, with a theoretical efficiency arbitrarily close to 100%. The emission and capture of the microwave energy is performed using tunable couplers, whose transmission coefficients vary in time. Using the superconducting phase qubit technology and tunable couplers with ...