OPTOQUEST Co.

Ageoshimo, Japan

OPTOQUEST Co.

Ageoshimo, Japan
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Patent
National Institute Of Information And Communications Technology and Optoquest Co. | Date: 2015-04-06

A device for coupling a multicore/multimode fiber that can transmit a large quantity of information. This multicore/multimode fiber coupling device has a first fiber group (11), a first light converging system (13), a first mode converter (15), a second fiber group (21), a second light converging system (23), and light converging system (33) for multicore fibers. By means of the first mode converter (15), light from the first fiber group (11) is subjected to mode conversion en masse. A space coupling system (33) for multicore fibers transmits light derived from the second fiber group (21) and light derived from the first fiber group (11) subjected to mode conversion to the multicore fibers (31).


Sakaguchi J.,Japan National Institute of Information and Communications Technology | Awaji Y.,Japan National Institute of Information and Communications Technology | Wada N.,Japan National Institute of Information and Communications Technology | Kanno A.,Japan National Institute of Information and Communications Technology | And 5 more authors.
Journal of Lightwave Technology | Year: 2012

We achieved record 109-Tb/s transmission over 16.8 km, using space division multiplexing (SDM) together with conventional multiplexing technology. 7-core SDM, 97 WDM (100-GHz spacing), 2 × 86 Gb/s PDM-QPSK signals were used. The spectral efficiency was 11.2 b/s/Hz. SDM transmission was realized using a multi-core fiber with ultra-low-crosstalk (less than -90.0 dB/km at 1550 nm) and high performance SDM MUX/DEMUX. The overall SDM crosstalk of -53 dB caused almost no penalty for the PDM-QPSK transmission. © 2006 IEEE.


Patent
Optoquest Co. and National Institute Of Information And Communications Technology | Date: 2012-06-12

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.


Patent
National Institute Of Information And Communications Technology and Optoquest Co. | Date: 2012-07-19

A cartridge-type optical functional module can achieve excellent optical coupling and has an optical fiber-type module or a waveguide-type module. The present invention relates to a cartridge-type optical functional module which has: first and second optical fiber collimators; an optical functional object which has an optical fiber-type module or a waveguide-type module; and a base section. The optical functional object has a third collimator, and a first alignment mechanism for aligning the position of the third collimator in the optical functional object.


Patent
National Institute Of Information And Communications Technology and Optoquest Co. | Date: 2014-04-23

[Problem] To provide 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. [Solution] This wavelength selective polarization controller has: a telecentric optical system (11) to which optical wavelength multiplexing signals are incident; a polarization controller (12) that controls the polarization plane of light output from the telecentric optical system; and an output optical system (13) for outputting to an optical path output from the polarization controller. The telecentric optical system (11) has: a first diffraction grating (15) to which the optical wavelength multiplexing signals are incident; and a first condenser (16) that condenses the optical wavelength multiplexing signals that have passed through the diffraction grating (15). The polarization controller (12) has a plurality of phase modulators (21, 22, 23).


Tottori Y.,Optoquest Co. | Kobayashi T.,Optoquest Co. | Watanabe M.,Optoquest Co.
IEEE Photonics Technology Letters | Year: 2012

A pair of compact optical connection modules that connect seven-core multicore fiber and seven single-mode fibers is developed. Insertion loss of < 0.6~ dB, polarization-dependent loss of < 0.1~ dB, and crosstalk of >-50 dB are observed. The structure is applicable to the multicore fiber with more than seven cores. © 2012 IEEE.


Klaus W.,Japan National Institute of Information and Communications Technology | Sakaguchi J.,Japan National Institute of Information and Communications Technology | Puttnam B.J.,Japan National Institute of Information and Communications Technology | Awaji Y.,Japan National Institute of Information and Communications Technology | And 3 more authors.
IEEE Photonics Technology Letters | Year: 2012

In this letter, we report on coupling optics for connecting single-core single-mode fibers with multicore single-mode fibers. After a brief discussion of the options for such coupling systems, we describe our approach of using bulk optics to fabricate low-loss and low-crosstalk devices for both 7-and 19-core multicore fibers with the free-space design approach. This enables the use of the same coupling device with a variety of multicore fibers whose structural parameters differ from one sample to another. We present the results of experimental evaluations of these devices, discuss various causes of insertion loss, and analyze the coupling loss in detail. © 2012 IEEE.


Patent
Optoquest Co. and Adamant Co. | Date: 2014-03-05

[Problem] To provide a connector whereby rotation of a multicore fiber does not occur. [Solution] An optical connector (17) of the present invention includes a ferrule (13) that holds a multicore fiber (11), and a plug frame (15) equipping the ferrule (13) housed therein. The ferrule (13) has at least one flat surface (19) on the outer circumferential surface thereof, and the plug frame (15) has a plate spring structure (21) to apply pressure on the flat surface (19). In the optical connector (17) of the present invention, the plate spring structure (21) is casted in the plug frame (15).


Patent
Optoquest Co. and Adamant Co. | Date: 2016-01-27

[Problem] To provide a connector whereby rotation of a multicore fiber does not occur. [Solution] An optical connector (17) of the present invention includes a ferrule (13) that holds a multicore fiber (11), and a plug frame (15) equipping the ferrule (13) housed therein. The ferrule (13) has at least one flat surface (19) on the outer circumferential surface thereof, and the plug frame (15) has a plate spring structure (21) to apply pressure on the flat surface (19). In the optical connector (17) of the present invention, the plate spring structure (21) is casted in the plug frame (15).


Patent
National Institute Of Information And Communication Technology and Optoquest Co. | Date: 2014-07-16

[Problem] To provide a cartridge-type optical functional module, which can achieve excellent optical coupling and has an optical fiber-type module or a waveguide-type module. [Solution] The present invention relates to a cartridge-type optical functional module (10) which has: first and second optical fiber collimators (2, 3); an optical functional object (5) which has an optical fiber-type module or a waveguide-type module; and a base section (7). The optical functional object (5) has a third collimator (13), and a first alignment mechanism (17) for aligning the position of the third collimator (13) in the optical functional object (5).

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