Abstract: Signal wavelengths ?1, ?2, ?3 of signal light components multiplexed at signal multiplexing sections 31, 41, 51 of multiplexing stations 3, 4, 5 installed on the input end side of an EDFA 2 on an optical transmission line 1 are set such that the wavelength-dependent noise figure of EDFA 2 successively decreases from the signal wavelength ?1 multiplexed at the signal multiplexing section 31 closest to the input end of EDFA 2 to ?2 and ?3. On the other hand, the transmission length of individual signal light component before being fed into the EDFA 2 is the shortest in the signal light component at ?1 and successively increases at ?2 and ?3. Thus, the order of magnitude of input signal light power is the same as the order of highness of noise figure in EDFA 2, whereby fluctuations in S/N ratio in the resulting amplified light are reduced.

Abstract: A connection member (21), which electrically connects a package (14) on which an optical element that converts an electric signal to an optical signal or converts an optical signal to an electric signal and at least one end portion including an incident/releasing port for an optical signal of an optical waveguide (11) that is optically coupled with the optical element to transmit the optical signal are mounted, and a second substrate (2) to each other, is provided with a holding unit having elasticity, which holds the package (14), and a connection unit that is connected to the substrate (2).

Abstract: Provided is a wavelength converter having a simple and low-cost structure. The wavelength converter generates converted light having a wavelength different from that of input light. The wavelength converter includes (1) a pump light source that outputs pump light, (2) an optical multiplexer that combines and outputs input light and the pump light, (3) a first optical fiber that receives and guides the input light and the pump light that have been combined and output by the optical multiplexer and generates converted light using a nonlinear optical phenomenon that occurs while the first optical fiber guides the input light and the pump light, the first optical fiber being coiled, and (4) zero-dispersion wavelength adjusting means that adjusts a zero-dispersion wavelength of the first optical fiber.

Abstract: The present invention relates to a light source apparatus that has a base structure capable of generating SC light and further having a structure that enables the shaping of the spectral waveform of the SC light, power adjustment of the SC light, or adjustment of the frequency of repetition of the pulse train that contains the SC light. For example, a light source apparatus that enables shaping of spectral waveforms comprises a seed light source that emits seed light which is a pulse train or continuous light; an optical fiber that generates SC light from the seed light, and spectrum shaping means for completely or partially changing the spectral waveform of the SC light. The shaping of the spectral waveform changes the maximum power of the seed light by changing the optical coupling efficiency of the seed light source and optical fiber, for example, thereby suitably deforms the spectrum of the SC light.

Abstract: An electrode structure has a Cu electrode that provided in a surface of a substrate, a diffusion preventing film that is made of a material in which a diffusion coefficient of Sn is equal to or lower than 3×10?23 cm2/sec, the whole Cu electrode being covered with the diffusion preventing film, and a solder layer that is provided above the diffusion preventing film, the solder layer being made of Au—Sn solder.

Abstract: In an electrode portion structure in which an electrode is formed in an end portion of a through-wiring, disconnection is prevented in an electrode portion. A through-hole that vertically pierces a substrate is made in the substrate, and a through-electrode is provided in the through-hole. The through-electrode is projected in s curved-surface manner from an upper surface of the substrate. The upper surface of the substrate 12 is coated with an insulating film, and a contact hole is made in the insulating film while aligned with the through-electrode. An opening diameter of the contact hole is lower than a sectional diameter of the through-electrode, and surroundings of an upper surface of the through-electrode are coated with the contact hole. A thickness Ddiel of the insulating film is equal to or lower than a projection length Dp of the through-electrode from the upper surface of the substrate at an opening edge of the contact hole.

Abstract: The present invention relates to a light source apparatus that has a base structure capable of generating SC light and further having a structure that enables the shaping of the spectral waveform of the SC light, power adjustment of the SC light, or adjustment of the frequency of repetition of the pulse train that contains the SC light. For example, a light source apparatus that enables shaping of spectral waveforms comprises a seed light source that emits seed light which is a pulse train or continuous light; an optical fiber that generates SC light from the seed light, and spectrum shaping means for completely or partially changing the spectral waveform of the SC light. The shaping of the spectral waveform changes the maximum power of the seed light by changing the optical coupling efficiency of the seed light source and optical fiber, for example, thereby suitably deforms the spectrum of the SC light.

Abstract: The present invention relates to a light source apparatus having a structure for stably supplying broadband pulsed light having a wavelength spectrum with an excellent flatness over a wide band. The light source apparatus employs, as a seed light source, a short-pulsed light source having such an excellent output pulse characteristic that the frequency bandwidth extending until the output pulse drops by 10 dB or 20 dB from a peak is 5 THz or more. The light source apparatus also includes a broadband light producing fiber having an optical characteristic suitable for combining with the short-pulsed light source. The broadband light producing fiber inputs pulsed light from the pulsed light source, and produces the broadband pulsed light by utilizing a nonlinear optical phenomenon. This structure yields broadband pulsed light having such a wavelength spectrum that a region whose power fluctuation is suppressed to 6 dB or less extends over 100 nm or more.

Abstract: The present invention relates to a light source apparatus that has a base structure capable of generating SC light and further having a structure that enables the shaping of the spectral waveform of the SC light, power adjustment of the SC light, or adjustment of the frequency of repetition of the pulse train that contains the SC light. For example, a light source apparatus that enables shaping of spectral waveforms comprises a seed light source that emits seed light which is a pulse train or continuous light; an optical fiber that generates SC light from the seed light, and spectrum shaping means for completely or partially changing the spectral waveform of the SC light. The shaping of the spectral waveform changes the maximum power of the seed light by changing the optical coupling efficiency of the seed light source and optical fiber, for example, thereby suitably deforms the spectrum of the light.

Abstract: An optical module has an optical element which transmits or receives an optical signal, an optical transmission line optically coupled to the optical element to transmit the optical signal, and a board to which at least one end portion including an incident and outgoing port of the optical signal in the optical transmission line and the optical element are fixed. A wall facing a side surface of the optical transmission line is provided in the board. A first space is provided between the board and the optical transmission line, and a second space is provided between the side surface of the optical transmission line and the wall. The first and second spaces are filled with a bonding agent.

Abstract: A connection member electrically connects an optical element configured to convert an electric signal to an optical signal or to convert an optical signal to an electric signal, a first substrate including an incident/releasing port of an optical transmission path for an optical signal at least one end portion thereof, and a second substrate to each other. The optical transmission path is optically coupled with the optical element to transmit the optical the connection. The connection member includes a connection unit connected to the second substrate and a holding unit having elasticity and holding the first substrate. The holding unit is provided with an electrode at a connecting position to the first substrate, and the holding unit holds the first substrate by connecting the first substrate to the electrode.

Abstract: An optical transmission module has a light-emitting element, a light-receiving element, and an optical path for optically coupling the light-emitting element and the light-receiving element, and transmitting a optical signal. The optical path has a core part, a clad part surrounding the core part, and a support board for supporting the optical path itself and the light-receiving element. A resin part formed of resin having a refractive index higher than air outside the optical path is arranged at a part of a surface area of the clad part along an optical transmission direction to which optical signals are transmitted. The resin part has an inclined surface in which the surface on the opposite side of the clad part is tilted relative to the optical transmission direction. The inclined surface forms an acute angle with the surface of the clad part at the opposite side of the light-receiving element in the resin part.

Abstract: An optical fiber and a broadband light source that can generate SC light having a broader bandwidth. A broadband light source 1 is equipped with a seed light source 11 and an optical fiber 12. The seed light source 11 outputs light having a central wavelength in the wavelength range of 1500 nm to 1650 nm. The optical fiber 12 outputs supercontinuum light a result of input of the light output from the seed light source. The optical fiber 12, which has a zero dispersion wavelength in the wavelength range of 1300 nm to 1500 nm and an effective area of 12 ?m2 or less at the central wavelength, outputs supercontinuum light having a wavelength bandwidth expanded to 1000 nm or more.

Abstract: A light emitting element circuit has a light emitting element, a drive circuit that supplies a current to the light emitting element, and a signal circuit that autonomously supplies a signal according to an ambient temperature. The signal adjusts the current such that the current corresponds to a temperature characteristic of the light emitting element.

Abstract: A broadband light source device that can generate supercontinuum light in a visible range and having a spectrum with a stable shape and high intensity is provided. The broadband light source device includes a diode-pumped solid-state laser light source that outputs seed light in response to being excited by a laser beam output from a semiconductor laser light source; a wavelength converter that receives the seed light to generate wavelength-converted light having a wavelength different from that of the seed light, and outputs the wavelength-converted light; and a nonlinear medium that receives the wavelength-converted light to generate supercontinuum light having a bandwidth of 100 nm or greater included in a wave band of 400 nm to 700 nm inclusive, and outputs the supercontinuum light.

Abstract: Provided is a wavelength converter having a simple and low-cost structure. The wavelength converter generates converted light having a wavelength different from that of input light. The wavelength converter includes (1) a pump light source that outputs pump light, (2) an optical multiplexer that combines and outputs input light and the pump light, (3) a first optical fiber that receives and guides the input light and the pump light that have been combined and output by the optical multiplexer and generates converted light using a nonlinear optical phenomenon that occurs while the first optical fiber guides the input light and the pump light, the first optical fiber being coiled, and (4) zero-dispersion wavelength adjusting means that adjusts a zero-dispersion wavelength of the first optical fiber.

Abstract: A connection member (21), which electrically connects a package (14) on which an optical element that converts an electric signal to an optical signal or converts an optical signal to an electric signal and at least one end portion including an incident/releasing port for an optical signal of an optical waveguide (11) that is optically coupled with the optical element to transmit the optical signal are mounted, and a second substrate (2) to each other, is provided with a holding unit having elasticity, which holds the package (14), and a connection unit that is connected to the substrate (2).

Abstract: An optical cable module has an optical waveguide formed by surrounding a core with a clad layer and a light-receiving/emitting element, installed on a supporting substrate. A light-releasing face of the optical waveguide or a light-incident face to the optical waveguide is aligned so as to face a light-receiving face or a light-emitting face of the light-receiving/emitting element. The optical waveguide is formed into a film shape having flexibility, and provided with a reinforcing member that prevents a deflection from occurring in the optical waveguide. The optical waveguide is placed on a protruding portion from a supporting face of the optical waveguide on the supporting substrate.

Abstract: An optical module has an optical element which transmits or receives an optical signal, an optical transmission line optically coupled to the optical element to transmit the optical signal, and a board to which at least one end portion including an incident and outgoing port of the optical signal in the optical transmission line and the optical element are fixed. A wall facing a side surface of the optical transmission line is provided in the board. A first space is provided between the board and the optical transmission line, and a second space is provided between the side surface of the optical transmission line and the wall. The first and second spaces are filled with a bonding agent.

Abstract: An optical module comprising has a support board, an optical transmission path, and at least a single optical element having a light receiving function or a light emitting function provided on the support board. A light emission surface of said optical transmission path or a light incidence surface of the optical transmission path is arranged such that said optical element and said optical transmission path are optically coupled to each other, with respect to a light receiving surface or a light emitting surface of said optical element. Said optical element is sealed by a sealing agent. A gap is provided between said optical transmission path and the surface of said sealing agent on the light receiving surface or the light emitting surface of said optical element.