J. E. Ungar

416 citations

40 papers · 338 · h-index 10

Impact in

Atomic and Molecular Physics, and Optics top 10%
- Semiconductor Quantum Structures and Devices
- Atomic and Subatomic Physics Research
- Advanced Fiber Laser Technologies
Electrical and Electronic Engineering
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Solid State Laser Technologies

Papers in

Atomic and Molecular Physics, and Optics 32
- Semiconductor Quantum Structures and Devices 26
- Advanced Fiber Laser Technologies 4
Electrical and Electronic Engineering 37
- Semiconductor Lasers and Optical Devices 30
- Photonic and Optical Devices 25
- Solid State Laser Technologies 9
- Advancements in Photolithography Techniques 2

Co-authors: Nadav Bar-Chaim (9 shared papers)Robert M. Lammert (17 shared papers)M.A. Newkirk (2 shared papers)I. Ury (4 shared papers)Bin Zhao (3 shared papers)Mark L. Osowski (13 shared papers)M. Mittelstein (3 shared papers)Amnon Yariv (2 shared papers)
Journals: Electronics Letters (11 papers)Applied Physics Letters (3 papers)IEEE Photonics Technology Letters (3 papers)Applied Physics B (1 paper)Advanced Solid-State Photonics (1 paper)
Partner nations: United States France Italy

In The Last Decade

J. E. Ungar

36 papers receiving 286 citations

Peers

Countries citing papers authored by J. E. Ungar

Since Specialization

Citations

This map shows the geographic impact of J. E. Ungar's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by J. E. Ungar with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites J. E. Ungar more than expected).

Fields of papers citing papers by J. E. Ungar

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by J. E. Ungar. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by J. E. Ungar. The network helps show where J. E. Ungar may publish in the future.

Co-authors

The 25 scholars most cited alongside J. E. Ungar, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with J. E. Ungar Line = papers co-authored together J. E. Ungar links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 40 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Low-threshold and high-temperature operation of InGaAlAs-InP lasers IEEE Photonics Technology Letters ·T.R. Chen, P.C. Chen, J. E. Ungar, M.A. Newkirk, Seunghwan Oh, Nadav Bar-Chaim	1997	46
2	Using frequency-narrowed, tunable laser diode arrays with integrated volume holographic gratings for spin-exchange optical pumping at high resonant fluxes and xenon densities Applied Physics B ·N. Whiting, Panayiotis Nikolaou, Neil A. Eschmann, Michael J. Barlow, Robert M. Lammert, J. E. Ungar, Wentao Hu, Laurent Vaissié	2012	34
3	Ultralow threshold multiquantum well InGaAs lasers Applied Physics Letters ·T. R. Chen, Bin Zhao, Yi Zhuang, Avigail Yariv, J. E. Ungar, Seunghwan Oh	1992	30
4	Optimised Fabry-Perot (AlGa)As quantum-well lasers tunable over 105 nm Electronics Letters ·D. Mehuys, M. Mittelstein, Amnon Yariv, Rona Sarfaty, J. E. Ungar	1989	29
5	High-power GaAlAs window lasers Electronics Letters ·J. E. Ungar, Nadav Bar-Chaim, I. Ury	1986	23
6	980-nm master oscillator power amplifiers with nonabsorbing mirrors IEEE Photonics Technology Letters ·Robert M. Lammert, J. E. Ungar, Mark L. Osowski, Haifeng Qi, M.A. Newkirk, N. Bar Chaim	1999	19
7	Second quantized state oscillation and wavelength switching in strained-layer multiquantum-well lasers Applied Physics Letters ·T. R. Chen, Yuhua Zhuang, Yichen Xu, Bin Zhao, Amnon Yariv, J. E. Ungar, Se Wook Oh	1992	14
8	Advances in high-brightness semiconductor lasers Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE ·Mark L. Osowski, Wentao Hu, Robert M. Lammert, Seunghwan Oh, Paul Rudy, T. S. Stakelon, Laurent Vaissié, J. E. Ungar	2008	13
9	GaAlAs window lasers emitting 500 mW CW in fundamental mode Electronics Letters ·J. E. Ungar, Nadav Bar-Chaim, Mohammad A. Mazed, M. Mittelstein, Seunghwan Oh, I. Ury	1990	12
10	High power operationof multiquantum well DFB lasers at 1.3 µm Electronics Letters ·T.R. Chen, P.C. Chen, J. E. Ungar, N. Bar-Chaim	1995	11
11	High power 980 nm nonabsorbing facet lasers Electronics Letters ·J. E. Ungar, N. Kwong, Seunghwan Oh, J.S. Chen, N. Bar Chaim	1994	10
12	980 nm high power, high slope efficiency distributedfeedback lasers with nonabsorbing mirrors Electronics Letters ·Robert M. Lammert, J. E. Ungar, Seunghwan Oh, Haifeng Qi, J.S. Chen, N. Bar Chaim	1998	10
13	High speed operation of very low threshold strained InGaAs/GaAs double quantum well lasers Applied Physics Letters ·Bin Zhao, T. R. Chen, Yi Zhuang, Avigail Yariv, J. E. Ungar, Seunghwan Oh	1992	9
14	High speed complex-coupled DFB laser at 1.3 µm Electronics Letters ·T.R. Chen, P.C. Chen, J. E. Ungar, Nadav Bar-Chaim	1994	8
15	Very large bandwidth strained MQW DFB laser at 1.3 μm IEEE Photonics Technology Letters ·T.R. Chen, J. E. Ungar, X.L. Yeh, Nadav Bar-Chaim	1995	7
16	Fast all-angle Mask 3D for ILT patterning Ryan L. Pearman, Mike Meyer, J. E. Ungar, Henry Yu, Leo Pang, Aki Fujimura	2020	7
17	High power (>10 W from 100 µm aperture) high reliability 808 nm InAlGaAs broad area laser diodes Electronics Letters ·Robert M. Lammert, Mark L. Osowski, Seunghwan Oh, Chameli Panja, J. E. Ungar	2006	6
18	High reliability, high power InGaAs/AlGaAs 980 nm distributed feedback lasers with nonabsorbing mirrors Robert M. Lammert, J. E. Ungar, Haifeng Qi, Seunghwan Oh, Mark L. Osowski, N. Bar Chaim	2003	6
19	High power operation of InGaAsP/InP multiquantumwell DFB lasers at 1.55 µm wavelength Electronics Letters ·T.R. Chen, J. E. Ungar, J. Iannelli, Seunghwan Oh, Hoang Mai Luong, Nadav Bar-Chaim	1996	6
20	High-power InGaAs-GaAs-AlGaAs distributed feedbacklasers with nonabsorbing mirrors Electronics Letters ·Robert M. Lammert, J. E. Ungar, Seunghwan Oh, Haifeng Qi, J.S. Chen	1998	5

About J. E. Ungar

J. E. Ungar is a scholar working on Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Ophthalmology, Spectroscopy and Instrumentation, having authored 40 papers that have together received 338 indexed citations. Recurring topics across this work include Semiconductor Lasers and Optical Devices (30 papers), Semiconductor Quantum Structures and Devices (26 papers), Photonic and Optical Devices (25 papers), Solid State Laser Technologies (9 papers), Advanced Fiber Laser Technologies (4 papers), Ocular and Laser Science Research (2 papers), Spectroscopy and Laser Applications (2 papers) and Advancements in Photolithography Techniques (2 papers). The work is most often cited by research in Atomic and Molecular Physics, and Optics (252 citations), Electrical and Electronic Engineering (283 citations), Spectroscopy (59 citations), Surfaces, Coatings and Films (13 citations) and Instrumentation (6 citations). J. E. Ungar has collaborated with scholars based in United States, France and Italy. Frequent co-authors include Nadav Bar-Chaim, Robert M. Lammert, M.A. Newkirk, I. Ury, Bin Zhao, Mark L. Osowski, M. Mittelstein, Amnon Yariv, Haifeng Qi and Avigail Yariv. Their work appears in journals such as Electronics Letters, Applied Physics Letters, IEEE Photonics Technology Letters, Applied Physics B and Advanced Solid-State Photonics.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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