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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 69  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
OCS, CS
(Joint)
2021-01-15
13:00
Online Online Effect of spatial resolution of compensated wave front on performance in volume hologram demultiplexer
Hotaka Hayashi, Atsushi Okamoto (Hokkaido Univ.), Taketoshi Takahata (OPTOQUEST), Satoshi Shinada, Yuta Goto, Naoya Wada (NICT), Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.)
(Advance abstract in Japanese is available) [more]
OCS, CS
(Joint)
2021-01-15
13:25
Online Online Experiment on joint switch of few-mode multi-core fiber using spatial light modulator
Yuta Abe, Atushi Okamoto, Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.), Daiki Soma, Noboru Yoshikane, Takehiro Tsuritani (KDDI Research, Inc.)
(Advance abstract in Japanese is available) [more]
QIT
(2nd)
2020-12-10
11:50
Online Online Direct measurement of ultrafast wave function of photons in the time domain
Kazuhisa Ogawa, Takumi Okazaki (Hokkaido Univ.), Hirokazu Kobayashi (Kochi Univ. Tech.), Toshihiro Nakanishi (Kyoto Univ.), Akihisa Tomita (Hokkaido Univ.)
(To be available after the conference date) [more]
QIT
(2nd)
2020-12-11
17:50
Online Online Formulation and experimental demonstration of complex variance of observables in pre- and post-selected systems
Natsuki Abe, Kazuhisa Ogawa (Hokkaido Univ.), Hirokazu Kobayashi (Kochi Univ. of Tech.), Akihisa Tomita (Hokkaido Univ.)
(To be available after the conference date) [more]
OFT, ITE-BCT, OCS, IEE-CMN [detail] 2020-11-12
16:25
Online Online Wave front compensation method for output signal in volume hologram demultiplexer
Hotaka Hayashi, Atsushi Okamoto (Hokkaido Univ.), Taketoshi Takahata (OPTOQUEST), Satoshi Shinada, Yuta Goto, Naoya Wada (NICT), Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.) OCS2020-25
Volume Hologram mode De-Multiplexer (VHDM) using Volume Hologram (VH) is extremely cost effective because it can multipl... [more] OCS2020-25
pp.11-14
ITE-HI, IE, ITS, ITE-MMS, ITE-ME, ITE-AIT [detail] 2020-02-28
13:15
Hokkaido Hokkaido Univ.
(Cancelled but technical report was issued)
Numerical analysis of relationship between light utilization efficiency and modulation accuracy in complex amplitude modulation based on iterative spatial cross modulation
Tomohiro Maeda, Atsushi Okamoto, Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.)
 [more]
QIT
(2nd)
2019-11-18
13:50
Tokyo Gakushuin University [Poster Presentation] Analysis of the effects of the two-photon distinguishability on decoy state measurement-device-independent quantum key distribution
Haobo Ge, Akihisa Tomita, Kazuhisa Ogawa, Atsushi Okamoto (Hokkaido Univ.)
Measurement-device-independent quantum key distribution (MDI-QKD) protects the receiver from attacks against the measure... [more]
OCS, LQE, OPE 2019-10-18
14:30
Kagoshima   Improvement of Diffraction Efficiency of Mode Demultiplexer Using Volume Hologram at 1550 nm
Taijun Shiba, Atsushi Okamoto, Hotaka Hayashi, Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.), Taketoshi Takahata (OPTOQUEST), Yuta Goto, Satoshi Shinada, Naoya Wada (NICT) OCS2019-47 OPE2019-85 LQE2019-63
To realize the mode division multiplexing transmission, we have proposed a volume holographic mode de-multiplexer (VHDM)... [more] OCS2019-47 OPE2019-85 LQE2019-63
pp.105-108
QIT
(2nd)
2019-05-20
17:50
Fukuoka Kyushu University, Chikushi Campus Numerical analysis of decoy state BBM92 quantum key distribution protocol with multi-photon rejection source
Takumi Matsuura, Liang Min, Kazuhisa Ogawa, Atsushi Okamoto, Akihisa Tomita (Hokkaido Univ.)
The BB84 protocol, which is a representative quantum key distribution protocol, requires a single photon source as a lig... [more]
QIT
(2nd)
2019-05-20
13:20
Fukuoka Kyushu University, Chikushi Campus [Poster Presentation] Variance of observables and its uncertainty relation in pre- and post-selected systems
Natsuki Abe, Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.)
A pre- and post-selected system has a complex characteristic value called weak value. The weak value in a pre- and post-... [more]
ITS, IE, ITE-MMS, ITE-HI, ITE-ME, ITE-AIT [detail] 2019-02-19
11:30
Hokkaido Hokkaido Univ. Improvement of noise separation accuracy in image reconstruction in virtual phase conjugation based optical tomography
Sota Nagayoshi, Atsushi Okamoto (Hokkaido Univ.), Yuta Goto (Fukui Univ.), Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.)
Virtual phase conjugation based optical tomography (VPC-OT) realizes single-shot three-dimensional (3D) measurement. In ... [more]
ITS, IE, ITE-MMS, ITE-HI, ITE-ME, ITE-AIT [detail] 2019-02-20
13:00
Hokkaido Hokkaido Univ. Analysis on Basic Operation of Virtual Shift Method for Accuracy Improvement of Holographic Diversity Interferometry
Nobuhiro Yamagishi, Atsushi Okamoto, Tomohiro Maeda (Hokkaido Univ.), Jin Nozawa (Aisin Seiki), Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.)
Holographic diversity interferometry (HDI) enables single-shot phase measurement by using two image sensors. However, mi... [more]
ITS, IE, ITE-MMS, ITE-HI, ITE-ME, ITE-AIT [detail] 2019-02-20
13:45
Hokkaido Hokkaido Univ. Accuracy improvement of phase modulated signal by calibrating spatial light modulator
Tomohiro Maeda, Atsushi Okamoto, Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.)
The modulation accuracy of phase-only spatial light modulators (SLMs) decreases by the distortion of the phase response ... [more]
QIT
(2nd)
2018-11-26
16:20
Tokyo The University of Tokyo Weak value measurement method without probes
Kazuhisa Ogawa (Hokkaido Univ.), Hirokazu Kobayashi (Kochi Univ. of Tech.), Akihisa Tomita (Hokkaido Univ.)
 [more]
QIT
(2nd)
2018-11-26
13:30
Tokyo The University of Tokyo [Poster Presentation] High-threshold GKP quantum computation with realistically noisy devices
Kosuke Fukui (Kyoto Univ.), Akihisa Tomita (Hokkaido Univ.), Keisuke Fjii (Kyoto Univ.)
To implement fault-tolerant quantum computation with continuous variables, the Gottesman--Kitaev--Preskill (GKP) qubit h... [more]
QIT
(2nd)
2018-06-05
10:00
Hiroshima ICCH Ran State tomographic characterization of BB84 states generated by a Dual-Parallel Modulator
Weiyang Zhang, Akihisa Tomita, Yu Kadosawa, Kazuhisa Ogawa (Hokkaido Univ.)
We have proposed the use of Dual-Parallel Modulator to generate BB84 states to reduce the state preparation flaw due to ... [more]
QIT
(2nd)
2018-06-05
15:40
Hiroshima ICCH Ran Acquisition method of complex values defined by system's evolution using qubit probes
Kazuhisa Ogawa (Hokkaido Univ.), Osamu Yasuhiko (Kyoto Univ.), Hirokazu Kobayashi (Kochi Univ. Tech.), Toshihiro Nakanishi (Kyoto Univ.), Takumi Okazaki, Akihisa Tomita (Hokkaido Univ.)
 [more]
QIT
(2nd)
2018-06-04
13:20
Hiroshima ICCH Ran [Poster Presentation] Tracking Quantum Error Correction
kosuke Fukui, Akihisa Tomita, Atsushi Okamoto (Hokkaido Univ.)
To implement fault-tolerant quantum computation with continuous variables, the Gottesman–Kitaev–Preskill (GKP) qubit has... [more]
ITS, IE, ITE-MMS, ITE-HI, ITE-ME, ITE-AIT [detail] 2018-02-16
13:00
Hokkaido Hokkaido Univ. Experiment on digital image multiplexing/demultiplexing using virtual phase conjugation for high density holographic memory
Yuta Goto, Atsushi Okamoto, Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.)
We experimentally implemented and proved the concept of the multiplexing and demultiplexing in digital images using VPC,... [more]
QIT
(2nd)
2017-11-16
13:50
Saitama Saitama University [Poster Presentation] BB84 Quantum Key Distribution system with a Dual-Parallel Modulator
Weiyang Zhang, Yu Kadosawa, Akihisa Tomita, Kazuhisa Ogawa, Atsushi Okamoto (Hokkaido Univ.)
The state preparation flaw which is generated by the pulse fluctuation in the signal applied for the phase modulator in ... [more]
 Results 1 - 20 of 69  /  [Next]  
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