J. Ungar

414 total citations
36 papers, 291 citations indexed

About

J. Ungar is a scholar working on Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics and Ophthalmology. According to data from OpenAlex, J. Ungar has authored 36 papers receiving a total of 291 indexed citations (citations by other indexed papers that have themselves been cited), including 34 papers in Electrical and Electronic Engineering, 29 papers in Atomic and Molecular Physics, and Optics and 2 papers in Ophthalmology. Recurrent topics in J. Ungar's work include Semiconductor Lasers and Optical Devices (27 papers), Semiconductor Quantum Structures and Devices (23 papers) and Photonic and Optical Devices (22 papers). J. Ungar is often cited by papers focused on Semiconductor Lasers and Optical Devices (27 papers), Semiconductor Quantum Structures and Devices (23 papers) and Photonic and Optical Devices (22 papers). J. Ungar collaborates with scholars based in United States, United Kingdom and France. J. Ungar's co-authors include N. Bar-Chaim, R.M. Lammert, M.A. Newkirk, I. Ury, M.L. Osowski, Bin Zhao, A. Yariv, M. Mittelstein, Wentao Hu and Haifeng Qi and has published in prestigious journals such as Applied Physics Letters, Electronics Letters and IEEE Photonics Technology Letters.

In The Last Decade

J. Ungar

31 papers receiving 255 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
J. Ungar United States	11	248	222	55	17	12	36	291
A. Yu. Leshko Russia	10	302 1.2×	236 1.1×	26 0.5×	2 0.1×	9 0.8×	43	320
T. Simoyama Japan	16	684 2.8×	377 1.7×	39 0.7×	4 0.2×	25 2.1×	57	719
T.P. Lee United States	10	436 1.8×	333 1.5×	32 0.6×	2 0.1×	8 0.7×	14	450
Gray Lin Taiwan	11	397 1.6×	371 1.7×	21 0.4×	6 0.4×	51 4.3×	76	448
J. Wallin Sweden	12	435 1.8×	254 1.1×	21 0.4×	2 0.1×	11 0.9×	38	463
D. Kasemset United States	12	411 1.7×	287 1.3×	57 1.0×	3 0.2×	53 4.4×	42	451
H. Hosomatsu Japan	11	398 1.6×	330 1.5×	26 0.5×	2 0.1×	15 1.3×	29	434
S. Knigge Germany	12	328 1.3×	226 1.0×	43 0.8×		5 0.4×	35	340
M. Krakowski France	12	404 1.6×	315 1.4×	43 0.8×		19 1.6×	84	427
J.L. Gentner Germany	13	275 1.1×	258 1.2×	13 0.2×	4 0.2×	35 2.9×	39	351

Countries citing papers authored by J. Ungar

Since Specialization

Citations

This map shows the geographic impact of J. 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. 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. Ungar more than expected).

Fields of papers citing papers by J. Ungar

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by J. 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. Ungar. The network helps show where J. Ungar may publish in the future.

Co-authorship network of co-authors of J. Ungar

This figure shows the co-authorship network connecting the top 25 collaborators of J. Ungar. A scholar is included among the top collaborators of J. Ungar based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with J. Ungar. J. Ungar is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Schellhorn, Martin, et al.. (2012). Crystalline fiber Ho³⁺:YAG laser resonantly pumped by high-spectral-brightness laser diodes. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 8235. 823518–823518. 1 indexed citations

Nikolaou, Panayiotis, Neil A. Eschmann, Michael J. Barlow, et al.. (2012). 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. 106(4). 775–788. 29 indexed citations

Lammert, R.M., et al.. (2008). High-power single-mode laser diodes with tapered amplifiers. 850–851. 2 indexed citations

Osowski, M.L., et al.. (2007). High Brightness Semiconductor Lasers with Internal Gratings. Advanced Solid-State Photonics. 5. WC2–WC2. 2 indexed citations

Osowski, M.L., et al.. (2007). High-brightness semiconductor lasers. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 6456. 64560D–64560D. 4 indexed citations

Lammert, R.M., et al.. (2006). High power (>10 W from 100 µm aperture) high reliability 808 nm InAlGaAs broad area laser diodes. Electronics Letters. 42(9). 535–536. 5 indexed citations

Ungar, J., et al.. (2002). Wide temperature range linear DFB lasers at 1.3 μm with very low threshold. 2. 169–170.

Lammert, R.M., et al.. (1999). 980-nm master oscillator power amplifiers with nonabsorbing mirrors. IEEE Photonics Technology Letters. 11(9). 1099–1101. 17 indexed citations

Lammert, R.M., et al.. (1998). High-power InGaAs-GaAs-AlGaAs distributed feedbacklasers with nonabsorbing mirrors. Electronics Letters. 34(9). 886–887. 3 indexed citations

10.

Lammert, R.M., et al.. (1998). 980 nm high power, high slope efficiency distributedfeedback lasers with nonabsorbing mirrors. Electronics Letters. 34(17). 1663–1664. 10 indexed citations

11.

Ungar, J., et al.. (1997). Low-threshold and high-temperature operation of InGaAlAs-InP lasers. IEEE Photonics Technology Letters. 9(1). 17–18. 44 indexed citations

12.

Ungar, J., et al.. (1997). Wide temperature range linear DFB lasers with verylow threshold current. Electronics Letters. 33(11). 963–965.

13.

Ungar, J., et al.. (1996). High power operation of InGaAsP/InP multiquantumwell DFB lasers at 1.55 µm wavelength. Electronics Letters. 32(10). 898–898. 6 indexed citations

14.

Ungar, J., et al.. (1995). High power operationof multiquantum well DFB lasers at 1.3 µm. Electronics Letters. 31(16). 1344–1345. 11 indexed citations

15.

Ungar, J., et al.. (1994). High speed complex-coupled DFB laser at 1.3 µm. Electronics Letters. 30(13). 1055–1057. 5 indexed citations

16.

Zhao, Bin, et al.. (1992). High speed operation of very low threshold strained InGaAs/GaAs double quantum well lasers. Applied Physics Letters. 60(11). 1295–1297. 8 indexed citations

17.

Zarem, Hal A., J. Ungar, M. Mittelstein, J. Paslaski, & I. Ury. (1992). High-power single-mode InGaAs lasers for pumping praseodymium-doped fiber amplifiers. WL7–WL7. 1 indexed citations

18.

Mehuys, D., et al.. (1989). Optimised Fabry-Perot (AlGa)As quantum-well lasers tunable over 105 nm. Electronics Letters. 25(2). 143–145. 25 indexed citations

19.

Chu, Steven, Y. Shevy, David S. Weiss, & J. Ungar. (1988). LASER COOLING DUE TO ATOMIC DIPOLE ORIENTATION. 2 indexed citations

20.

Ungar, J., N. Bar-Chaim, & I. Ury. (1986). High power AlGaAs window lasers. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 610. 115–115.

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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