摘要:
An external resonator which includes a multiple resonator with parameters which allow stable wavelength control, and a variable-wavelength light source includes such an external resonator are provided. The external resonator is a multiple resonator which is made up of first to third ring-shaped resonators, each having different light path length, and connected in series via optical coupling means. The parameters of the multiple resonator are characterized in that all the following Expressions , and hold: L1={M1/(M1−1)}L0 L2={M2/(M2−1)}L0 M2−1=(M1−1)2 where L0 is the light path length of the first resonator, L1 is the light path length of the second resonator and L2 is the light path length of the third resonator, and M1 and M2 are integers of 3 or greater.
摘要:
The object is to provide a highly reliable, high-performance, and low-price tunable light source and the like. The present invention comprises: a multiple resonator that oscillates with a wavelength where frequencies of three or more resonant elements with shifted cycles intersect; and a tunable device for controlling the resonant wavelength of the multiple resonator by simultaneously changing the respective optical path lengths of the plurality of resonant elements constituting the multiple resonator. The multiple resonator has a structure in which three resonant elements are connected in series; and provided that the optical path lengths of the resonant elements are L0, L1, L2, Vernier orders are M1>1, M2>1, the optical path lengths are defined as L 1 = M 1 M 1 - 1 L 0 , L 2 = M 2 M 2 - 1 , phase amount “Phase” is the changed optical path length standardized by one-wavelength of the optical path length, and the respective phase amount “Phase” of the two ring resonant elements whose optical path lengths are to be changed are defined as “PhaseM1” and “PhaseM2”, the tunable device controls the increase/decrease amount of the phase amount “PhaseM1” and “PhaseM2” based on a linear function with a slope of M 2 - 1 M 1 - 1 .
摘要:
An external resonator which includes a multiple resonator with parameters which allow stable wavelength control, and a variable-wavelength light source includes such an external resonator are provided. The external resonator is a multiple resonator which is made up of first to third ring-shaped resonators, each having different light path length, and connected in series via optical coupling means. The parameters of the multiple resonator are characterized in that all the following Expressions , and hold: L1={M1/(M1−1)}L0 L2={M2/(M2−1)}L0 M2−1=(M1−1)2 where L0 is the light path length of the first resonator, L1 is the light path length of the second resonator and L2 is the light path length of the third resonator, and M1 and M2 are integers of 3 or greater.
摘要:
The object is to provide a highly reliable, high-performance, and low-price tunable light source and the like. The present invention comprises: a multiple resonator that oscillates with a wavelength where frequencies of three or more resonant elements with shifted cycles intersect; and a tunable device for controlling the resonant wavelength of the multiple resonator by simultaneously changing the respective optical path lengths of the plurality of resonant elements constituting the multiple resonator. The multiple resonator has a structure in which three resonant elements are connected in series; and provided that the optical path lengths of the resonant elements are L0, L1, L2, Vernier orders are M1>1, M2>1, the optical path lengths are defined as L 1 = M 1 M 1 - 1 L 0 , L 2 = M 2 M 2 - 1 , phase amount “PM” is the changed optical path length standardized by one-wavelength of the optical path length, and the respective phase amount “PM” of the two ring resonant elements whose optical path lengths are to be changed are defined as “PM1” and “PM2”, the tunable device controls the increase/decrease amount of the phase amount “PM1” and “PM2” based on a linear function with a slope of M 2 - 1 M 1 - 1 .
摘要翻译:目的是提供高可靠性,高性能和低价格的可调光源等。 本发明包括:多个谐振器,其以三个或更多个具有移位周期的谐振元件的频率相交的波长振荡; 以及用于通过同时改变构成多个谐振器的多个谐振元件的相应光程长度来控制多谐振器的谐振波长的可调谐器件。 多谐振器具有三个谐振元件串联连接的结构; 并且假设谐振元件的光路长度为L0,L1,L2,游标为M1> 1,M2> 1,则光程长度被定义为L 1 = M 1 M 1 -1 L 0 L 2 = M 2 M 2 -1,相位量“PM”是由光路长度的一个波长标准化的改变的光程长度,以及两个环路谐振元件的相位量“PM” 被改变为“PM1”和“PM2”时,可调谐装置基于具有M 2 -1 M 1的斜率的线性函数来控制相位量“PM1”和“PM2”的增减量 - 1。
摘要:
A wavelength selective polarization controller capable of controlling the polarization plane of optical wavelength multiplexing signals, for each wavelength component, and which does not generate time lag between each component is provided. This wavelength selective polarization controller has: a telecentric optical system to which optical wavelength multiplexing signals are incident; a polarization controller that controls the polarization plane of light output from the telecentric optical system; and an output optical system for outputting to an optical path output from the polarization controller. The telecentric optical system has: a first diffraction grating to which the optical wavelength multiplexing signals are incident; and a first condenser that condenses the optical wavelength multiplexing signals that have passed through the diffraction grating. The polarization controller has a plurality of phase modulators.
摘要:
An electrical connector to be connected to a flat conductive member includes a housing including an upper wall and a lower wall; a terminal including a contact portion for contacting with the flat conductive member; and an engaging protrusion for engaging the flat conductive member. The housing further includes a receptacle portion between the upper wall and the lower wall for receiving the flat conductive member. The upper wall includes a cut portion. The engaging protrusion is situated under the cut portion, so that an edge portion of the flat conductive member moves over the engaging protrusion and deforms into the cut portion when the flat conductive member is inserted into the receptacle portion.
摘要:
In a process for microprocessing a synthetic quartz glass substrate by wet etching, an organic coating layer of silane or silazane is formed on the substrate, and a photoresist film is formed on the organic coating layer, prior to the wet etching.
摘要:
A planographic printing plate packing box that can help solve problems regarding cost reduction and management adaptability to multiple product types, and a planographic printing plate packing structure using the planographic printing plate packing box is to be provided without damaging the coat of the planographic printing plate. It is a is planographic printing plate packing box (30), formed by folding one or more corrugated fiberboards, is a packing box for fitting inside and packing a stacked object (20) of planographic printing plates. Side end portions of corrugated fiberboards are folded, and sides (44T) and (48T) at the tips of end side portions are so arranged as to oppose a side of the stacked object, and the sides of the tips of end side portions and the side of the stacked object are at least as close to parallelism as 30 degrees.
摘要:
A tunable laser is provided, including: a multiple ring resonator that is formed by coupling ring resonant elements having different optical path length from each other; an input/output-side waveguide connected to one of the ring resonant elements; a reflection-side wave guide connected to another one of the ring resonant elements; a PLC substrate on which the multiple ring resonator, the input/output side waveguide, and the reflection-side waveguide are formed; a high reflection film provided to the reflection-side waveguide; an SOA connected to the input/output-side waveguide; film heaters and a phase control region of the SOA for changing the resonant wavelength of the multiple ring resonator; and a light-receiving element for detecting the resonant wavelength of the multiple ring resonator in a thru port of a directional coupler.
摘要:
A light-emitting element includes a light amplification unit and an external resonator. The light amplification unit has a function of amplifying light. The external resonator is connected to the light amplification unit. The external resonator includes a planar light waveguide and a stress application unit. The planar light waveguide is arranged inside the external resonator. The stress application unit applies stress directly or indirectly to at least a partial region of the planar light waveguide.