| Octave-spanning coherent supercontinuum generation in silicon on insulator from 1.06 μm to beyond 2.4 μm N Singh, M Xin, D Vermeulen, K Shtyrkova, N Li, PT Callahan, ... Light: Science & Applications 7 (1), 17131-17131, 2018 | 166 | 2018 |
| Tunable millimeter-wave frequency synthesis up to 100 GHz by dual-wavelength Brillouin fiber laser MC Gross, PT Callahan, TR Clark, D Novak, RB Waterhouse, ML Dennis Optics express 18 (13), 13321-13330, 2010 | 83 | 2010 |
| High-power thulium lasers on a silicon photonics platform N Li, P Purnawirman, Z Su, E Salih Magden, PT Callahan, K Shtyrkova, ... Optics letters 42 (6), 1181-1184, 2017 | 72 | 2017 |
| Integrated CMOS-compatible Q-switched mode-locked lasers at 1900nm with an on-chip artificial saturable absorber K Shtyrkova, PT Callahan, N Li, ES Magden, A Ruocco, D Vermeulen, ... Optics Express 27 (3), 3542-3556, 2019 | 64 | 2019 |
| One-femtosecond, long-term stable remote laser synchronization over a 3.5-km fiber link M Xin, K Şafak, MY Peng, PT Callahan, FX Kärtner Optics express 22 (12), 14904-14912, 2014 | 59 | 2014 |
| Broadband 2-µm emission on silicon chips: monolithically integrated Holmium lasers N Li, ES Magden, Z Su, N Singh, A Ruocco, M Xin, M Byrd, PT Callahan, ... Optics express 26 (3), 2220-2230, 2018 | 57 | 2018 |
| Long-term stable, sub-femtosecond timing distribution via a 1.2-km polarization-maintaining fiber link: approaching 10−21 link stability MY Peng, PT Callahan, AH Nejadmalayeri, S Valente, M Xin, ... Optics Express 21 (17), 19982-19989, 2013 | 53 | 2013 |
| Fiber-coupled balanced optical cross-correlator using PPKTP waveguides PT Callahan, K Safak, P Battle, TD Roberts, FX Kärtner Optics express 22 (8), 9749-9758, 2014 | 37 | 2014 |
| Photonic signal generation for millimeter-wave communications JA Nanzer, PT Callahan, ML Dennis, TR Clark Johns Hopkins APL technical digest 30 (4), 299-308, 2012 | 36 | 2012 |
| Photonic analog-to-digital conversion PT Callahan, ML Dennis, TR Clark Jr Johns Hopkins APL technical digest 30 (4), 280-286, 2012 | 35 | 2012 |
| Millimeter-wave wireless communication using dual-wavelength photonic signal generation and photonic upconversion JA Nanzer, PT Callahan, ML Dennis, TR Clark, D Novak, RB Waterhouse IEEE Transactions on Microwave Theory and Techniques 59 (12), 3522-3530, 2011 | 35 | 2011 |
| All fiber-coupled, long-term stable timing distribution for free-electron lasers with few-femtosecond jitter K Şafak, M Xin, PT Callahan, MY Peng, FX Kärtner Structural dynamics 2 (4), 2015 | 32 | 2015 |
| Frequency-independent phase noise in a dual-wavelength brillouin fiber laser PT Callahan, MC Gross, ML Dennis IEEE Journal of Quantum Electronics 47 (8), 1142-1150, 2011 | 27 | 2011 |
| Integrated mode-locked lasers in a CMOS-compatible silicon photonic platform C Sorace-Agaskar, PT Callahan, K Shtyrkova, A Baldycheva, M Moresco, ... 2015 Conference on Lasers and Electro-Optics (CLEO), 1-2, 2015 | 20 | 2015 |
| Breaking the femtosecond barrier in multi-kilometer timing synchronization systems M Xin, K Şafak, MY Peng, A Kalaydzhyan, PT Callahan, W Wang, ... IEEE Journal of Selected Topics in Quantum Electronics 23 (3), 97-108, 2016 | 19 | 2016 |
| Integrated-photonics-based architectures for polarization-gradient and EIT cooling of trapped ions A Hattori, S Corsetti, T Sneh, M Notaros, R Swint, PT Callahan, ... Frontiers in Optics, FM4B. 3, 2022 | 15 | 2022 |
| Frequency domain spectroscopy in rare-earth-doped gain media ES Magden, P Callahan, N Li, JDB Bradley, N Singh, A Ruocco, ... IEEE Journal of Selected Topics in Quantum Electronics 24 (5), 1-10, 2018 | 14 | 2018 |
| Double-chirped Bragg gratings in a silicon nitride waveguide PT Callahan, TN Adam, G Leake, D Coolbaugh, MR Watts, FX Kärtner CLEO: Science and Innovations, SF1E. 7, 2016 | 13 | 2016 |
| Photonic upconversion of 60 GHz IEEE 802.15. 3c standard compliant data signals using a dual-wavelength laser ML Dennis, JA Nanzer, PT Callahan, MC Gross, TR Clark, D Novak, ... 2010 23rd Annual Meeting of the IEEE Photonics Society, 383-384, 2010 | 13 | 2010 |
| Integrated visible-light polarization rotators and splitters for atomic quantum systems A Hattori, T Sneh, M Notaros, S Corsetti, PT Callahan, D Kharas, ... Optics Letters 49 (7), 1794-1797, 2024 | 11 | 2024 |
Franz X KaertnerCenter for Free-Electron Laser Science and University of HamburgVerified email at cfel.de