Abstract:
It is an object of the present invention to test a device under test including an optical interface. Provided is a device interface apparatus on which is loaded a device under test including an optical interface. The device interface apparatus comprises a device loading section on which the device under test is loaded; an optical connector that is to be connected to the optical interface of the device under test; and an optical connector moving section that moves the optical connector toward the optical interface of the device under test loaded on the device loading section, to optically connect the optical connector and the optical interface.
Abstract:
Provided is a test apparatus that tests a device under test including an optical coupler for transmitting optical signals in a surface direction and a first groove for holding an optical transmission path connected to the optical coupler. The test apparatus comprises a substrate on which the device under test is to be loaded; an optical transmission path to be connected to the optical coupler; and a pressing section that presses the optical transmission path from the substrate side toward the first groove. Also provided is a test method.
Abstract:
The object is to measure the carrier envelope offset frequency of a mode-locked laser. Provided is a pulse laser that measures a carrier envelope offset frequency of a mode-locked laser, pulse laser comprising a mode-locked laser that generates an optical pulse; a band expanding section that expands an oscillated frequency range of the mode-locked laser; a harmonic generating section that generates a harmonic component of the mode-locked laser; a light transmitting section that inputs light to the harmonic generating section without changing relative timings of a predetermined frequency component of the mode-locked laser output from the band expanding section and a frequency component that is at least double the predetermined frequency component; a detecting section that detects a beat signal of the harmonic component and the component passed through the harmonic generating section by the mode-locked laser; and a calculating section that calculates a carrier envelope offset frequency and a repeating frequency based on the beat signal.
Abstract:
There are provided a manufacturing apparatus and a manufacturing method for manufacturing a substrate having a dielectric film, including a heat treatment apparatus that subjects a substrate on which a raw material containing composite oxide is applied, to heat treatment and crystallization in an atmosphere containing oxygen in a volume ratio of 20% or above under pressure of an atmospheric pressure or above. The manufacturing apparatus may manufacture a substrate having a ferroelectric film used as an optical control device. The heat treatment apparatus may include: a chamber that keeps, in the atmosphere, the substrate on which the raw material is applied; and a pressure adjusting section that adjusts a pressure of the atmosphere in the chamber to a predetermined value for a predetermined time period during heat treatment.
Abstract:
To extend the temperature range for a stable operation without mode hopping and obtain a stable laser oscillation, a laser oscillator is provided. The laser oscillator includes: an optical circulator in which light incident on a first port is exited from the second port, light incident on the second port is exited from a third port, and light incident on a fourth port is exited from the first port; a first optical amplification fiber that amplifies the light exited from the third port because of being excited by an exciting light and injects the same into the first port; a reflective optical filter that reflects light with a predetermined wavelength among the light exited from the second port and injects the same into the second port again; and an pump light source that generates an exciting light to excite the first optical amplification fiber. The reflective optical filter transmits light oscillated by laser in a ring resonator including the first optical amplification fiber, the optical circulator and the reflective optical filter and outputs the same. The pump light source injects the exciting light from the fourth port into a ring resonator.
Abstract:
There is provided a wavelength determining device including a reference wavelength measuring section 42 that, based upon a number A of interference fringes generated by an optical path difference of first reference wavelength light (wavelength: λ1) and a number C of interference fringes generated by the optical path difference of second reference wavelength light (wavelength: λ2), measures the wavelength of the second reference wavelength light, an input light wavelength measuring section 44, based upon the number A of the interference fringes generated by the optical path difference of the first reference wavelength light (wavelength: λ1) and a number B of interference fringes generated by the optical path difference of input light (wavelength: λx), measures the wavelength of the input light, a correction coefficient determining section 46 that determines a second correction coefficient k based upon the measured wavelength λc of the second reference wavelength light and the measured wavelength λm of the input light, and an input light wavelength correcting section 48 that corrects the measured wavelength of the input light by multiplying the measured wavelength λm of the input light by the second correction coefficient k, in order to correctly measure the wavelength λx(=k·λm) of the input light.
Abstract:
To extend the temperature range for a stable operation without mode hopping and obtain a stable laser oscillation, a laser oscillator is provided. The laser oscillator includes: an optical circulator in which light incident on a first port is exited from the second port, light incident on the second port is exited from a third port, and light incident on a fourth port is exited from the first port; a first optical amplification fiber that amplifies the light exited from the third port because of being excited by an exciting light and injects the same into the first port; a reflective optical filter that reflects light with a predetermined wavelength among the light exited from the second port and injects the same into the second port again; and an pump light source that generates an exciting light to excite the first optical amplification fiber. The reflective optical filter transmits light oscillated by laser in a ring resonator including the first optical amplification fiber, the optical circulator and the reflective optical filter and outputs the same. The pump light source injects the exciting light from the fourth port into a ring resonator.
Abstract:
There is provided a wavelength determining device including a reference wavelength measuring section 42 that, based upon a number A of interference fringes generated by an optical path difference of first reference wavelength light (wavelength: λ1) and a number C of interference fringes generated by the optical path difference of second reference wavelength light (wavelength: λ2), measures the wavelength of the second reference wavelength light, an input light wavelength measuring section 44, based upon the number A of the interference fringes generated by the optical path difference of the first reference wavelength light (wavelength: λ1) and a number B of interference fringes generated by the optical path difference of input light (wavelength: λx), measures the wavelength of the input light, a correction coefficient determining section 46 that determines a second correction coefficient k based upon the measured wavelength λc of the second reference wavelength light and the measured wavelength λm of the input light, and an input light wavelength correcting section 48 that corrects the measured wavelength of the input light by multiplying the measured wavelength λm of the input light by the second correction coefficient k, in order to correctly measure the wavelength λx(=k·λm) of the input light.
Abstract:
There is provided a light receiving device including a polarization dispersing section that disperses a polarization direction of incoming light into a plurality of polarization directions, a light collecting section that has a metal pattern shaped like concentric circles on a surface thereof, where the light collecting section collects light that has passed through the polarization dispersing section, and a light receiving section that receives the light collected by the light collecting section. Also provided are a light receiving device manufacturing method and a light receiving method. The light collecting section may have a surface plasmon antenna that has the metal pattern shaped like the concentric circles on a surface thereof, and the light receiving section may receive the light collected toward a center of the concentric circles of the metal pattern of the light collecting section, through a hole at the center of the concentric circles, on a rear side of the light collecting section.
Abstract:
Provided is a test apparatus that tests a device under test including an optical coupler transmitting optical signals in a direction perpendicular to a device surface. The test apparatus comprises a substrate on which the device under test is to be loaded; an optical transmission path that transmits the optical signals: and a lens section that is provided facing the optical coupler on the substrate and that focuses the optical signals from an end of one of the optical coupler and the optical transmission path to an end of the other.