Abstract:
Disclosed is an apparatus and method including a semiconductor substrate including a waveguide having a guiding region and one or more bounding regions coupled to the guiding region; a first PN junction disposed in the substrate and coupled to one or more of the one or more bounding regions; and dopant atoms disposed within the semiconductor substrate at the PN junction. An alternate embodiment includes a memory device, having a waveguide having a guiding region for propagating a radiation signal; an influencer, coupled to the waveguide, for controlling a characteristic of the radiation signal propagating in the waveguide between a first mode and a second mode; and a latching layer, coupled to the guiding region and responsive to the influencer, for retaining the characteristic of the radiation signal for a memory cycle.
Abstract:
Methods of attenuating, delaying the phase, and otherwise controlling an optical signal propagating along a waveguide are provided. According to one method, a variable optical attenuator structure is provided comprising a waveguide core, a cladding, an electrooptic polymer, and a set of control electrodes. The core, the cladding, and the electrooptic polymer are configured such that an increase in the index of refraction of the polymer causes a substantial portion of an optical signal propagating along the waveguide core to couple into a relatively high index region of the electrooptic polymer above the waveguide core, so as to inhibit return of the coupled signal to the waveguide core. Another embodiment of the present invention introduces a phase delay in the coupled optical signal and permits return of the coupled signal to the waveguide core. An additional embodiment contemplates the use of a ridge waveguide structure to enable control of the optical signal.
Abstract:
PROBLEM TO BE SOLVED: To provide an optical device capable of suitably maintaining the amount of light to be outputted to the outside.SOLUTION: In an optical modulator 1, positions of emission ends of two waveguides 42b and 42c can be shifted from each other in a direction A which is an extension direction of the waveguides and is a propagation direction of light emitted from the waveguides, by setting an angle θ formed between an emission end surface 41b of a waveguide substrate 41 and the direction A to less than 0° and more than 90°. On the other hand, a distance between the two waveguides 42b and 42c and a distance between condenser elements 6a and 6b of a light condensing member 6 having the condenser elements 6a and 6b formed on an element installation surface 60b can be adjusted by adjusting an attachment position of the light condensing member 6, whereby the amount of light to be outputted to the outside can be suitably maintained.
Abstract:
PROBLEM TO BE SOLVED: To lock the wavelength of a ring resonator of an optical switch element to the wavelength of an optical signal component in a WDM signal.SOLUTION: An optical switch element includes a substrate, a ring resonator formed on the substrate, a first waveguide formed on the substrate in optical coupling with the ring resonator, the first waveguide being configured to guide a WDM signal, an optical detector configured to detect an optical signal component in the ring resonator, and a temperature regulator driven in response to an output signal of the optical detector, the temperature regulator being configured to change a temperature of the ring resonator, the ring resonator having a resonant wavelength corresponding to a wavelength of an optical signal component that constitutes the WDM signal, the ring resonator, the optical detector and the temperature regulator constituting together a feedback control system that locks the resonant wavelength of the ring resonator to the wavelength of the optical signal component in the WDM signal.
Abstract:
PROBLEM TO BE SOLVED: To achieve simplification of circuitry and reduction in size thereof.SOLUTION: The optoelectronic integrated circuit comprises an optical splitter formed on a substrate and outputting an input optical signal while branching into N (N is an integer of 2 or more) optical signals, and N optical phase modulator(s) formed on the substrate for each optical signal output from the optical splitter, and outputting the optical signal while adjusting the phase thereof on the basis of the phase modulation characteristics where the phase variation depends upon the wavelength of light.
Abstract:
PROBLEM TO BE SOLVED: To provide a coplaner line with small attenuation caused by leak of electromagnetic waves to a substrate in a millimeter wave band without forming such a thick insulating film with film thickness equal to or more than 10 μm on a silicon monocrystalline substrate. SOLUTION: The coplaner line includes: the substrate 20; a signal line 42 formed on the substrate; a pair of grounding conductors 44 formed at positions sandwiching the signal line on the substrate; an insulating film 32 for signal line provided between the substrate and the signal line; and an insulating film 34 for grounding conductor provided separately from the insulating film for signal line and between the substrate and the grounding conductors. COPYRIGHT: (C)2010,JPO&INPIT