Yoshiyasu Ueno

Professor, National University of Electro-Communications, Tokyo, Japan

---

Research Interests

All-optical lightwave control, Ultrafast optical logics, Quantum electronics, Modeling & engineering of optical-communications components

• -->> Ueno's curriculum vitae
  
  
• -->> Ueno's profile in Linkedin
  
  
• -->> List of Published Papers, and, Patents
  
  
• -->> Some Essays in our Future Vision of this 21st Century
  
  
• -->> Research Group's website

Previous Achievements

1. Pioneer works in the ultrahigh-frequency operation of SMZ-type all-optical semiconductor switches--- the switching frequency (repetition frequency) of switches of this type had been believed to be limited to 10-40 GHz. We have been studying the frequency limit both experimentally and analytically, building theoretical backgrounds for the electron-photon dynamics in this frequency region, and also demonstrating several types of switchings (wavelength conversion, logic operation, etc.) in the frequency range of 80 to 160 GHz. [These frequencies are significantly higher than those of electronic transistors. Furthermore, their switching-powers at e.g. 40 GHz can be significantly lower than those of electronic transistors in the same frequency region.]
2. Proposal of a new type of all-optical switch--- a wavelength convertor that consists of an semiconductor optical amplifier (SOA) and a Mach-Zehnder interferometer (SMZ-DISC, Fig. 1). This switch is compact and stable, because of the simplicity of its structure.
3. Proposal of a brand new application--- When the DISC and a few passive components are inserted in a fiber-based ring cavity, the cavity starts generating ultrashort, Fourier-transform-limited optical pulses. We predicted its mechanism and then observed such ultrashort pulses that matched well with the prediction. The mechanism is new; it is completely different from those of mode-locked lasers.

Selected Papers

1. Y. Ueno, S. Nakamura, and K. Tajima, "Record low-power all-optical semiconductor switch operation at ultrafast repetition rates above the carrier cutoff frequency," Opt. Lett. vol. 23, no. 23, pp. 1846-1848, Dec. 1998. online abstract , full text
2. Y. Ueno, S. Nakamura, and K. Tajima, 'Ultrafast 168-GHz 1.5-ps 1-fJ Symmetric-Mach-Zehnder-type all-optical semiconductor switch,' Jpn. J. Appl. Phys. vol. 39, part 2, no. 8A, pp. L806-808, August 2000. online abstract , full text
3. S. Nakamura, Y. Ueno, and K. Tajima, '168-Gbit/s all-optical wavelength conversion with a symmetric-Mach-Zehnder-type switch,' IEEE Photonics Technol. Lett., vol. 13, no. 10, pp. 1091-1093, Oct. 2001. online abstract , full text
4. Y. Ueno, S. Nakamura, and K. Tajima, "Ultrahigh-speed data regeneration and wavelength conversion for OTDM systems (Invited Talk)," 27th European Conference on Optical Communication (ECOC 2001), Sept. 30-Oct. 4, 2001, Amsterdam, Netherlands, paper Th.F.2.1. online abstract , full text
5. Y. Ueno, S. Nakamura, and K. Tajima, 'Penalty-free error-free all-optical data pulse regeneration at 84 Gb/s by using a Symmetric-Mach-Zehnder-type semiconductor regenerator,' IEEE Photonics Technol. Lett. vol. 13, no. 5, pp. 469-471, May 2001. online abstract , full text
6. Y. Ueno, S. Nakamura, and K. Tajima, '5-ps, 10-GHz pulse generation from an all-optical semiconductor switch embedded in a ring cavity,' Appl. Phys. Lett., vol. 79, no. 16, pp. 2520-2522, Oct. 2001. online abstract , full text
7. Y. Ueno, S. Nakamura, and K. Tajima, 'Nonlinear phase shifts induced by semiconductor optical amplifiers with control pulses at repetition frequencies in the 40-160 GHz range for use in ultrahigh-speed all-optical signal processing,' J. Opt. Soc. Am. B, Vol. 19, no. 11, pp. 2573-2589, Nov. 2002. online abstract , full text
8. Y. Ueno, M. Toyoda, R. Suzuki, and Y. Nagasue, 'Modeling of the polarization-discriminating-symmetric-Mach-Zehnder-type optical-3R gate scheme and its available degree of random-amplitude-noise suppression,' Optics Express, vol. 14, no. 1, pp. 348-360, Jan. 2006. abstract , full text
9. R. Suzuki, T. Ohira, J. Sakaguchi, and Y. Ueno, '40-GHz mode-locked pulse generation with a new scheme of SOA-based pulse generators,' CLEO/QELS 2006, May 21-26, 2006, Long beach, USA, paper no. CMG5. abstract , full text
10. Jun Sakaguchi, Takehiro Nishida, and Yoshiyasu Ueno, "200-Gb/s wavelength conversion using a delayed-interference all-optical semiconductor gate assisted by nonlinear polarization rotation," Optics Communications vol. 282, no. 9, pp. 1728-1733, May 2009. abstract , full text

Biography

1985-1987

Univ. of Tokyo, Department of Physics, Laboratory of Prof. Nobukata Nagasawa

• Spectroscopic studies of the second-order optical processes near the exciton resonance in red-HgI₂ uniaxial semiconductor crystals at the liquid Helium temperature.

Laboratory members and Prof. Nobukata Nagasawa, February 1st, 1986

1987-1994

Opto-electronics Laboratories, NEC Corporation (at Kawasaki in 1987-1991, then at Tsukuba in 1991-1994)

R&D of high-power AlGaInP red lasers (for use in high-density optical disk systems)

• Proposal of high-power laser structure with ordered Ga_0.5In_0.5P crystals (1990)
• Development of reliable high-power strained QW GaInP lasers after analysis of carrier confinement (1992)
• Analysis of anisotropic oscillator strengths for the strained ordered Ga_0.5In_0.5P crystals (1993)
• 30-mW 680-nm strained QW lasers were commercialized in 1993 (NDL3230)

1995-1996

School of Optics/CREOL, Univ. Central Florida, Prof. George I. Stegeman's Group

• Theoretical and experimental studies of the second-order susceptibility tensor components, chi⁽²⁾_ij, of C_3v Ga_0.5In_0.5P ordered crystals for use in chi⁽²⁾:chi⁽²⁾-cascading-type all-optical switches.

1996-2002

Opto-Electronics Research Laboratories, NEC Corporation, Tsukuba, Japan

R&D of SMZ-type all-optical switchings in ultrahigh frequency regions from 40 to 160 GHz

• Proposal of SMZ-DISC wavelength convertor structure, and its ultralow-power 1-fJ switching (1998)
• Modeling of the electron-photon dynamics and the MZ interference in such high frequency regions (1998-2002)
• Proposal of control scheme for optimizing the interference phase bias of those switches (1998-2002)
• Demonstration of 168-Gb/s wavelength conversion and that 84-Gb/s optical 3R gating (2000-2001)
• Proposal of DISC-Loop-type optical-pulse generator and all-optical divided-clock extractor (2001)
• Demonstration of 5-ps, 10-GHz pulse generation (2001)

Farewell photo at NEC R&D Laboratory, Tsukuba, on February 28, 2002

March 2002 through March 2009

Associate Professor in Department of Electronic Engineering, Univ. of Electro-Communications, Tokyo

(Graduate School of Electronic Engineering, Univ. of Electro-Communications, Tokyo)

April 2009 through March 2010

Professor in Department of Electronic Engineering, Univ. of Electro-Communications, Tokyo

(Graduate School of Electronic Engineering, Univ. of Electro-Communications, Tokyo)

Since April 2010

Professor in Graduate school of Engineering Science, Univ. of Electro-Communications, Tokyo

(Department of Engineering Science, Univ. of Electro-Communications, Tokyo)

Degrees:

PhD degree, Applied Physics, University of Tokyo, 1998

Ms degree, Physics, Univ. of Tokyo, 1987

Bs degree, Physics, Univ. of Tokyo, 1985

July 2004, in the University of Electro-Communications

Awards

• July 1994, Best Paper Award (Optical Memory Symposium '94, Japan Society of Applied Physics), Y. Ueno, H. Sawano, S. Kawata, K. Hara, K. Tada, H. Hotta, K. Endo, and K. Kobayashi, "Low-noise high-power 680-nm AlGaInP laser with sub-GHz frequency response."
  
  
• 1996, NEC 1st-class R&D Award, to the group of 15 researchers (from Director of R&D Group, NEC Corporation, Japan), "Research-and-development of the high-quality 30-mW 685-nm red laser for use in magneto-optical-disk memory systems."
  
  
• 1999, NEC 2nd-class R&D Award, to the group of five researchers (from Director of R&D Group, NEC Corporation, Japan), "Research-and-development of the ultrafast all-optical switch."
  
  
• July 2002, Best Paper Award (OECC 2002, IEICE), Y. Ueno, M. Takahashi, K. Suzuki, T. Shimizu, S. Nakamura, A. Furukawa, T. Tamanuki, K. Mori, T. Ae, T. Sasaki, and K. Tajima, "Control scheme for the optimization of the interferometer phase bias in the Symmetric-Mach-Zehnder all-optical switches."
  
  
• Oct 2010, Best Paper Award (TriSAI 2010, BUPT-KAIST-UEC), Y. Ueno, "Crude future vision of 300-GHz optical micro-processor units."

Research collaborations/Co-authors

Full names of co-authors in the academic journal papers

Visits to Institutes

One-day visits to research institutes

Academic Society Memberships

IEEE Photonics Society (previously LEOS), Senior Member

Optical Society of America (OSA)

Japanese Society of Applied Physics (JSAP)

Board or examiner committee tasks in academic organizations and research-grant organizations

IEEE/LEOS Summer Topicals Mtg., Technical program committee member, Dec. 2001--July 2002.

"Broad-band optical synthesizer" project (FY2002-2004), MEXT, board committee member, Nov. 2002--March 2005.

Asia-Pacific Microwave Photonics Conference 2006 (AP-MWP 2006), Technical program committee member, August 2004--April 2006.

Center for International Programs and Exchange (CIPE), UEC, board committee member, April 2006--March 2008.

"Photonic Network Technology" project (FY2002-2006, Profs. Y. Nakano and Y. Arakawa), OITDA/NEDO/METI (USD60M), post-evaluation committee member, June 2007--Nov. 2007.

Four electronics-related research projects (FY2006-2008), MEXT/JST (USD15M), post-evaluation committee member, Sept-Dec. 2008.

4th Triangle Symposium on Advanced Information and Communication Technology (TriSAI 2009), Organizing committee member, June 2009 -- Nov. 2009.

PhD thesis examiner tasks

Motoharu Matsuura, Research on all-optical signal control devices utilizing optical amplifiers, March 2004,
Thesis examiners: Profs. Tetsuya Miki (chair), Kikuo Ujihara, Tadamasa Kimura, Mitsuo Takeda, Naoto Kishi, and Yoshiyasu Ueno.
-->> present affiliation: National Univ. Electro-Communications (UEC), Tokyo.

Jun Sakaguchi, 200-Gb/s waveform analysis of ultrafast all-optical semiconductor gates towards low-power consumption operation, June 2008,
Thesis examiners: Profs. Yoshiyasu Ueno (chair), Koichi Yamaguchi, Kenichi Ueda, Tsuyoshi Okuno, Naoto Kishi, and Takeshi Kamiya.
-->> present affiliation: National Institute of Information and Communications Technology (NICT), Tokyo (Photonic Network Research Center, Dr. Naoya Wada's group).

Kiyohide Sakai, Study on waveguide-type second-harmonic generation for high-power green light emissiion, March 2009,
Thesis examiners: Profs. Tadamasa Kimura (chair), Masayoshi Watanabe, Yoshiyasu Ueno, Hajime Nishioka, and Hideo Isshiki.
-->> present affiliation: Mitsubishi Electric Corp., R&D center (continuously before and after PhD).

Md. Nur-Al-Safa Bhuiyan, Studies on several processing for optical polarization shift keying modulation format, March 2011,
Thesis examiners: Profs. Naoto Kishi (chair), Mitsuo Takeda, Yoshio Karasawa, Yoshiyasu Ueno, and Eiji Oki.
-->> present affiliation: University of Rajshahi, Rajshahi, Bangladesh.

Satoshi Shimizu, All-optical signal regenerator (temporarily), March 2011 (Tokyo Institute of Technology (Titech)),
Thesis examiners: Profs. Hiroyuki Uenohara (chair), Masayuki Izutsu, Fumio Koyama, Masahiro Asada, Tomoyuki Miyamoto, and Yoshiyasu Ueno (UEC Tokyo).
-->> present affiliation: National Institute of Information and Communications Technology (NICT), Tokyo (Photonic Network Research Center, Dr. Naoya Wada's group).

Kanaka Raju Pandiri, A Raman approach for arbitrary optical waveform synthesis, March 2011,
Thesis examiners: Profs. Masayuki Katsuragawa (chair), Kenichi Ueda, Kenichi Nakagawa, Mitsuo Takeda, and Yoshiyasu Ueno.
-->> present affiliation: Riken R&D center, Wako city, Saitama (Dr. Katsumi Midorikawa's group).

Karen Solis Trapala, Quantum-dot based microdisk lasers and semiconductor optical amplifiers operating at 1.55 um, Nov. 2011 (Eindhoven University of Technology, the Netherlands),
Core thesis-examiners: Profs. Harmen J.S. Dorren, P.M. Koenraad, A.G. Tijhuis, Jesper Mørk (Tech. Univ. Denmark, Denmark), Yoshiyasu Ueno (UEC, Tokyo), et al.
-->> present affiliation: National Institute of Advanced Industrial Science and Technology (AIST), Network Photonics Research Center, Tsukuba city, Ibaraki (Dr. Shu Namiki's group).

Nguyen Tan Hung, Multi-wavelength optical signal-processing for re-congifurable fiber-optic communication systems , March 2012, Thesis examiners: Profs. Naoto Kishi (chair), Eiji Oki, Mitsuo Takeda, Yoshiyasu Ueno, and Nobuo Nakajima.
-->> present affiliation: National Institute of Advanced Industrial Science and Technology (AIST), Network Photonics Research Center, Tsukuba city, Ibaraki (Dr. Shu Namiki's group).

Nguyen The Quang, Raman amplification based adiabatic soliton compressor for wavelength division multiplexing and optical time division multiplexing networks , scheduled in June 2012, Thesis examiners: Profs. Naoto Kishi (chair), Eiji Oki, Yoshiyasu Ueno, Hajime Nishioka, and Nobuo Nakajima.

Peer-reviewing research journal papers

OSA's Optics Express

OSA's Optics Letters

OSA's Journal of Optical Society of America, B

IEEE/LEOS's Photonics Technology Letters

IEEE/OSA Journal of Lightwave Technology

IEEE/LEOS's Journal of Quantum Electronics

IEEE/LEOS's Journal of Selected Topics in Quantum Electronics

IEE's Electronics Letters (presently, IET's)

Elsevier's Optics Communications

JSAP's Japanese Journal of Applied Physics

Invited Talks in Academic Conferences (after 2000)

Year 2000:
Y. Ueno, S. Nakamura, H. Hatakeyama, T. Tamanuki, T. Sasaki, and K. Tajima, "168-Gb/s OTDM wavelength conversion using SMZ-type all-optical switch," 26th European Conference on Optical Communication (ECOC 2000), Sept. 4-7, 2000, Munich, Germany, vol. 1, pp. 13-14. online abstract , full text

Year 2002:
Y. Ueno, S. Nakamura, and K. Tajima, "Ultrafast SOA-based SMZ-type all-optical regenerators and wavelength converters (Invited)," Int. Conf. on Solid State Devices & Materials (SSDM 2002), Nagoya, Sept. 17-19, 2002, paper G-4-1, pp. 342-343. full text

Year 2003:
Y. Ueno, 'All-optical signal processing for over-100-Gb/s optical TDM networks (Invited Talk),' IEEE LEOS Annual Meeting (LEOS 2003), Oct. 26-30, 2003, Tucson, USA, vol. 1, pp. 380-381. online abstract , full text

Year 2005:
G. Theophilopoulos, Y. Ueno, and S.A. Hamilton, panel discussion 'Outlook in 10-20 years (invited),' OFC workshop 'All-optical wavelength conversion and signal processing for next generation network,' Optical Fiber Communication Conference (OFC 2005), Los Angeles, March 6-11, 2005. workshop program

Year 2005:
Y. Ueno, M. Toyoda, and R. Suzuki, 'Theoretical models of the SOA-based SMZ-type optical-3R gates (Invited talk),' Optical Amplifiers and their Applications (OAA 2005), Budapest, Hungary, August 7-10, 2005, paper MB3. full text

Year 2008:
Yoshiyasu Ueno, 'Recent trends in the research of ultrafast, all-optical semiconductor gate devices (Invited talk),' OCS-OPE-LQE symposium, Institute of Electronics, Information, and Communication Engineers (IEICE), Kawasaki, Japan, Sept. 16-19, 2008, paper BCI-1-6. full text (in Japanese)

Year 2009:
Yoshiyasu Ueno, Jun Sakaguchi, Ryoichi Nakamoto, and Takehiro Nishida, "Ultrafast, low-energy-consumption, semiconductor-based, all-optical gate devices (Invited Talk)," 4th Asia-Pacific Microwave Photonics Conference (APMP 2009), April 22-24, 2009, Beijing, P.R. China. digest, voice, program.

Year 2010:
Yoshiyasu Ueno, 'Roadmap of ultrafast energy-saving optical semiconductor devices to Year 2025 (Invited talk),' Japanese Society of Applied Physics, Hiratsuka city, Kanagawa, Japan, March 17-20, 2010.

Year 2010:
Yoshiyasu Ueno, "Roadmap of ultrafast energy-saving optical semiconductor devices to Year 2025 (Invited Talk)," 42nd International Conference on Solid State Devices and Materials (ssdm2010), Sept. 22-24, 2010, Univ. of Tokyo, Tokyo, Japan. digest, program of invited talks

Year 2010:
Yoshiyasu Ueno, "Crude future vision of 300-GHz optical micro-processor units (Invited Talk)," Special session "Ecology/compound device," SEMI Technology Symposium (STS), 34th SEMICON Japan, organized by SEMI Japan,^*) Dec. 1, 2010, Makuhari Messe, Chiba, Japan. program and abstracts of invited talks
*) Semiconductor Equipment and Materials International (SEMI)

Nation-wide research project memberships

• "Femtosecond Technology" project (FY1996-2004, project leaders: Drs. Fujio Saito and Teruo Sakurai),
  NEDO/METI, research member (FY1996-2001).
  
  
• "Next-Generation Ultrahigh-Speed Optical-Communication Node" project (FY1998-2000, project leaders: Dr. Akira Hasegawa),
  NEDO/METI, research member (FY1998-2000).
  
  
• "Total Optical Communication Technology" project (FY1996-2005, project leaders: Drs. Akira Hasegawa and Tetsuya Miki),
  NICT/MIC, research member (FY1996-2005).

Home towns in private life

• 1961-1965: born and grew up in Osaka prefecture, Japan.
• 1965-1972: Tokyo, Japan.
• 1972-1980: Nishinomiya and Kobe city (Hyogo prefecture).
• 1980-1991: Tokyo and then Kawasaki city.
• 1991-1994, 1996-2002: Tsukuba city, and its neibour Chiyoda town (Ibaraki prefecture).
• 1995-1996: impressive 15 months with my wife and our two running-around kids in Orlando city, Florida, USA.
• 2002-2003: weekend daddy in Chofu city, Tokyo.
• 2003-present: living with my family in Machida city (population 400,000), with many beautiful woods, parks, rice fields, and some golf courses in the western Tokyo area, about 40-minutes drive to the west from our university campus in Chofu city (population 200,000).

Recent private life with my family

Family.....

wife, and two sons now going to a university and a high school from our home.

Private life style.....

classic tennis playing, classic piano playing, all-season mountain hiking, bicycle touring (not much since long...), alpine skiing (still good to go with wife and teen-age sons), slow bike touring (through beautiful towns, parks, rivers, mild mountains, and sea-side areas).

-> some others with photos (in japanese, though.)

Contact Address at Work

Yoshiyasu Ueno, Prof.

Graduate School of Engineering Science

(previously, Graduate School of Electronic Engineering)

National University of Electro-Communications

Chofu, Tokyo 182-8585, Japan

email: nospam-yoshiyasu.ueno@uec.ac.jp (or nospam-y.ueno@ieee.org)

[remove 'nospam-' from the above email addresses before emailing to those addresses.]