Patrick T. Callahan

847 total citations
58 papers, 617 citations indexed

About

Patrick T. Callahan is a scholar working on Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering and Artificial Intelligence. According to data from OpenAlex, Patrick T. Callahan has authored 58 papers receiving a total of 617 indexed citations (citations by other indexed papers that have themselves been cited), including 41 papers in Atomic and Molecular Physics, and Optics, 40 papers in Electrical and Electronic Engineering and 4 papers in Artificial Intelligence. Recurrent topics in Patrick T. Callahan's work include Advanced Fiber Laser Technologies (36 papers), Photonic and Optical Devices (28 papers) and Advanced Photonic Communication Systems (13 papers). Patrick T. Callahan is often cited by papers focused on Advanced Fiber Laser Technologies (36 papers), Photonic and Optical Devices (28 papers) and Advanced Photonic Communication Systems (13 papers). Patrick T. Callahan collaborates with scholars based in United States, Germany and Canada. Patrick T. Callahan's co-authors include Franz X. Kärtner, Ming Xin, Michael R. Watts, Emir Salih Magden, Nanxi Li, Alfonso Ruocco, Diedrik Vermeulen, Erich P. Ippen, Michael L. Dennis and Katia Shtyrkova and has published in prestigious journals such as International Journal of Hydrogen Energy, Optics Letters and Optics Express.

In The Last Decade

Patrick T. Callahan

50 papers receiving 576 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Patrick T. Callahan United States 12 489 442 37 36 26 58 617
J. Braunstein Germany 16 532 1.1× 210 0.5× 12 0.3× 16 0.4× 60 2.3× 65 643
Ana Gómez Oliva Spain 8 213 0.4× 224 0.5× 8 0.2× 30 0.8× 16 0.6× 25 313
Shyue Seng Tan Singapore 12 301 0.6× 84 0.2× 11 0.3× 34 0.9× 6 0.2× 32 401
Mathieu Chauvet France 10 119 0.2× 184 0.4× 2 0.1× 32 0.9× 54 2.1× 27 268
David Lagarde France 12 689 1.4× 336 0.8× 10 0.3× 764 21.2× 80 3.1× 37 1.0k
Sihao Wang United States 11 435 0.9× 469 1.1× 36 1.0× 87 3.3× 26 674
Masaru Takechi Japan 11 257 0.5× 163 0.4× 52 1.4× 24 0.9× 37 337
A. V. Shcherbakov Russia 12 251 0.5× 258 0.6× 1 0.0× 41 1.1× 49 1.9× 35 420
David Gevaux United Kingdom 8 264 0.5× 338 0.8× 1 0.0× 80 2.2× 59 2.3× 47 437
Anna Musiał Poland 15 339 0.7× 450 1.0× 118 3.3× 79 3.0× 50 541

Countries citing papers authored by Patrick T. Callahan

Since Specialization
Citations

This map shows the geographic impact of Patrick T. Callahan'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 Patrick T. Callahan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Patrick T. Callahan more than expected).

Fields of papers citing papers by Patrick T. Callahan

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Patrick T. Callahan. 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 Patrick T. Callahan. The network helps show where Patrick T. Callahan may publish in the future.

Co-authorship network of co-authors of Patrick T. Callahan

This figure shows the co-authorship network connecting the top 25 collaborators of Patrick T. Callahan. A scholar is included among the top collaborators of Patrick T. Callahan 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 Patrick T. Callahan. Patrick T. Callahan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Ku, Anthony Y., et al.. (2025). Driving towards competitive hydrogen dispensing cost for heavy-duty road transport: Quantifying and mitigating near-term operational penalties. International Journal of Hydrogen Energy. 184. 151781–151781.
2.
Clements, Ethan, R.B. Swint, Patrick T. Callahan, et al.. (2025). Integrated-Photonics-Based Devices and Systems for Polarization-Gradient Cooling of Trapped Ions. SS117_1–SS117_1.
3.
Singh, Neetesh, Ming Xin, Nanxi Li, et al.. (2019). Silicon photonics optical frequency synthesizer - SPOFS. Conference on Lasers and Electro-Optics. ATh4I.2–ATh4I.2. 3 indexed citations
4.
Singh, Neetesh, Ming Xin, Nanxi Li, et al.. (2019). Silicon photonics optical frequency synthesizer - SPOFS. Conference on Lasers and Electro-Optics. 3 indexed citations
5.
Kärtner, Franz X., Patrick T. Callahan, Katia Shtyrkova, et al.. (2018). Integrated rare-Earth doped mode-locked lasers on a CMOS platform. 14–14. 4 indexed citations
6.
Magden, Emir Salih, Patrick T. Callahan, Nanxi Li, et al.. (2018). Frequency Domain Spectroscopy in Rare-Earth-Doped Gain Media. IEEE Journal of Selected Topics in Quantum Electronics. 24(5). 1–10. 10 indexed citations
7.
Singh, Neetesh, Ming Xin, Diedrik Vermeulen, et al.. (2017). Octave-spanning coherent supercontinuum generation in silicon on insulator from 1.06 μm to beyond 2.4 μm. Light Science & Applications. 7(1). 17131–17131. 106 indexed citations
8.
Xin, Ming, Kemal Şafak, Michael Y. Peng, et al.. (2016). Breaking the Femtosecond Barrier in Multi-Kilometer Timing Synchronization Systems. IEEE Journal of Selected Topics in Quantum Electronics. 23(3). 97–108. 13 indexed citations
9.
Peng, Michael Y., Patrick T. Callahan, Amir H. Nejadmalayeri, et al.. (2013). LONG-TERM STABLE, LARGE-SCALE, OPTICAL TIMING DISTRIBUTION SYSTEMS WITH SUB-FEMTOSECOND TIMING STABILITY*. DESY (CERN, DESY, Fermilab, IHEP, and SLAC). 2 indexed citations
10.
Peng, Michael Y., Patrick T. Callahan, Amir H. Nejadmalayeri, et al.. (2013). Long-term stable, sub-femtosecond timing distribution via a 12-km polarization-maintaining fiber link: approaching 10^−21 link stability. Optics Express. 21(17). 19982–19982. 30 indexed citations
11.
Groß, Michael, Patrick T. Callahan, & Michael L. Dennis. (2012). A fiber laser photonic frequency synthesizer: Concept, performance, and applications. 30(4). 287–298.
12.
Clark, Thomas R., et al.. (2012). Wideband Photonic Compressive Sampling. Optical Fiber Communication Conference. OW3I.1–OW3I.1. 2 indexed citations
13.
Clark, Thomas R., Patrick T. Callahan, & Michael L. Dennis. (2012). Wideband photonic and compressive sampling analog-to-digital converter: architecture, device requirements, and applications. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 8259. 825907–825907. 1 indexed citations
14.
Waterhouse, Rodney, Dalma Novak, Christina Lim, et al.. (2011). RF over fiber distribution schemes for 60 GHz wireless personal area networks (WPANs). Asia-Pacific Microwave Conference. 1714–1717. 4 indexed citations
15.
Callahan, Patrick T., Michael L. Dennis, & Thomas R. Clark. (2011). Experimental demonstration of a phase-modulated optoelectronic oscillator using balanced detection. 1–4. 1 indexed citations
16.
Nanzer, Jeffrey A., et al.. (2011). 60 GHz broadband free-space communication using dual-wavelength photonic signal generation. 2011 IEEE MTT-S International Microwave Symposium. 1–4. 3 indexed citations
17.
Groß, Michael, Patrick T. Callahan, Thomas R. Clark, et al.. (2010). Tunable millimeter-wave frequency synthesis up to 100 GHz by dual-wavelength Brillouin fiber laser. Optics Express. 18(13). 13321–13321. 52 indexed citations
18.
Dennis, Michael L., Patrick T. Callahan, & Michael Groß. (2010). Suppression of relative intensity noise in a Brillouin fiber laser by operation above second-order threshold. 28–29. 2 indexed citations
19.
Callahan, Patrick T., Michael L. Dennis, & Thomas R. Clark. (2009). Nonuniform photonic sampling techniques for broadband frequency identification. 1–4. 4 indexed citations
20.
Callahan, Patrick T.. (1975). Third party response behavior in foreign policy. OhioLink ETD Center (Ohio Library and Information Network). 2 indexed citations

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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