Sten Helmfrid

519 total citations
26 papers, 392 citations indexed

About

Sten Helmfrid is a scholar working on Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics and Ceramics and Composites. According to data from OpenAlex, Sten Helmfrid has authored 26 papers receiving a total of 392 indexed citations (citations by other indexed papers that have themselves been cited), including 24 papers in Electrical and Electronic Engineering, 20 papers in Atomic and Molecular Physics, and Optics and 3 papers in Ceramics and Composites. Recurrent topics in Sten Helmfrid's work include Photonic and Optical Devices (14 papers), Advanced Fiber Laser Technologies (14 papers) and Photorefractive and Nonlinear Optics (9 papers). Sten Helmfrid is often cited by papers focused on Photonic and Optical Devices (14 papers), Advanced Fiber Laser Technologies (14 papers) and Photorefractive and Nonlinear Optics (9 papers). Sten Helmfrid collaborates with scholars based in Sweden, Denmark and Japan. Sten Helmfrid's co-authors include G. Arvidsson, J. Webjörn, Hanna‐Mari Baldauf, H. Walther, Margareta K. Linnarsson, B. Jaskorzyńska, Ari T. Friberg, P.-Y. Fonjallaz, Bengt Sahlgren and E. Vanin and has published in prestigious journals such as Optics Letters, Journal of Lightwave Technology and IEEE Journal of Quantum Electronics.

In The Last Decade

Sten Helmfrid

26 papers receiving 374 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Sten Helmfrid Sweden 9 330 294 47 35 25 26 392
M. Marano Italy 12 398 1.2× 331 1.1× 21 0.4× 29 0.8× 42 1.7× 26 454
G. Bonfrate United Kingdom 10 234 0.7× 207 0.7× 38 0.8× 73 2.1× 29 1.2× 12 302
Juan F. Hodelin United States 6 348 1.1× 272 0.9× 169 3.6× 29 0.8× 74 3.0× 10 482
Q. Z. Shu United States 5 131 0.4× 86 0.3× 12 0.3× 32 0.9× 83 3.3× 7 195
Yoh Ogawa Japan 11 352 1.1× 479 1.6× 15 0.3× 10 0.3× 13 0.5× 39 493
M. Karásek Czechia 12 383 1.2× 867 2.9× 5 0.1× 54 1.5× 37 1.5× 70 890
D. Bayart France 15 164 0.5× 711 2.4× 8 0.2× 129 3.7× 81 3.2× 85 772
I. I. Ryzhov Russia 11 279 0.8× 63 0.2× 38 0.8× 5 0.1× 50 2.0× 29 309
Mingming Nie China 12 301 0.9× 320 1.1× 7 0.1× 17 0.5× 32 1.3× 38 366
Tong Hoang Tuan Japan 17 633 1.9× 750 2.6× 9 0.2× 37 1.1× 51 2.0× 71 806

Countries citing papers authored by Sten Helmfrid

Since Specialization
Citations

This map shows the geographic impact of Sten Helmfrid'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 Sten Helmfrid with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Sten Helmfrid more than expected).

Fields of papers citing papers by Sten Helmfrid

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Sten Helmfrid

This figure shows the co-authorship network connecting the top 25 collaborators of Sten Helmfrid. A scholar is included among the top collaborators of Sten Helmfrid 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 Sten Helmfrid. Sten Helmfrid 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.
Helmfrid, Sten, et al.. (2017). Strain and temperature measurement using a 9.5-m continuous chirped fiber Bragg grating with millimeter resolution. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 10323. 103238D–103238D. 3 indexed citations
2.
Helmfrid, Sten, et al.. (2008). A novel tunable ROADM concept based on tilted fiber Bragg gratings and MEMS technology. owb 5. 1–2. 1 indexed citations
3.
Helmfrid, Sten, et al.. (2005). Stitch error effect on group-delay ripple for long chirped fiber Bragg gratings. Applied Optics. 44(20). 4375–4375. 2 indexed citations
4.
Helmfrid, Sten, et al.. (2003). Fibre Bragg grating characterization with ultraviolet-based interferometric side diffraction. Journal of Optics A Pure and Applied Optics. 5(5). 437–441. 4 indexed citations
5.
Sahlgren, Bengt, et al.. (2002). Fabrication of advanced fiber Bragg gratings by use of sequential writing with a continuous-wave ultraviolet laser source. Applied Optics. 41(6). 1051–1051. 27 indexed citations
6.
Helmfrid, Sten, et al.. (2002). Limitations of the interferometric side diffraction technique for fibre Bragg grating characterization. Optics Communications. 201(4-6). 301–308. 5 indexed citations
7.
Helmfrid, Sten, et al.. (1999). Spatial holeburning in second-order excitationprobabilitydistribution for densely erbium-doped fibres. Electronics Letters. 35(14). 1191–1193. 1 indexed citations
8.
Świłło, Marcin, et al.. (1999). Method for characterization of clustering and homogeneous upconversion in Er-doped waveguides. Integrated Photonics Research. RMF4–RMF4. 3 indexed citations
9.
Helmfrid, Sten, et al.. (1999). Observation of energy-distribution-dependent homogeneousupconversion in erbium-doped silica glass fibres. Electronics Letters. 35(14). 1189–1191. 5 indexed citations
10.
Helmfrid, Sten, et al.. (1999). Spatial holeburning in second-order excitation probability distribution for densely erbium-doped fibres. Integrated Photonics Research. RMF3–RMF3. 1 indexed citations
11.
Jaskorzyńska, B., E. Vanin, & Sten Helmfrid. (1998). Gain-saturation gratings with an arbitrary diffusion rate of excited states. Journal of the Optical Society of America B. 15(3). 945–945. 3 indexed citations
12.
Baldauf, Hanna‐Mari, et al.. (1997). Heterodyne measurement of the fluorescent radiation of a single trapped ion. Optics Communications. 133(1-6). 170–174. 70 indexed citations
13.
Jaskorzyńska, B., et al.. (1996). Gain saturation and pump depletion in high-efficiency distributed-feedback rare-earth-doped lasers. Optics Letters. 21(17). 1366–1366. 16 indexed citations
14.
Helmfrid, Sten, et al.. (1995). Influence of Spot Size and Spectral Width of the Pump Radiation on the Efficiency of Laser-Diode-Pumped Solid-State Lasers. Optical Review. 2(3). 199–203. 3 indexed citations
15.
Helmfrid, Sten, et al.. (1994). Stable single-mode operation of intracavity-doubled diode-pumped Nd:YVO4 lasers: theoretical study. Journal of the Optical Society of America B. 11(3). 436–436. 31 indexed citations
16.
Helmfrid, Sten, et al.. (1993). Theoretical study of a modulator for a waveguide second-harmonic generator. Journal of the Optical Society of America B. 10(3). 459–459. 4 indexed citations
17.
Helmfrid, Sten, G. Arvidsson, & J. Webjörn. (1993). Influence of various imperfections on the conversion efficiency of second-harmonic generation in quasi-phase-matching lithium niobate waveguides. Journal of the Optical Society of America B. 10(2). 222–222. 28 indexed citations
18.
Helmfrid, Sten, Fredrik Laurell, & G. Arvidsson. (1993). Optical parametric amplification of a 1.54- mu m single-mode DFB laser in a Ti:LiNbO/sub 3/ waveguide. Journal of Lightwave Technology. 11(9). 1459–1469. 3 indexed citations
19.
Nakatsuka, Shin‐ichi, et al.. (1992). Highly efficient and stable green microlaser consisting of Nd:YV0 4 with intracavity KTP for optical storage. Conference on Lasers and Electro-Optics. 1 indexed citations
20.
Helmfrid, Sten, et al.. (1991). Stimulated emission in Er:Ti:LiNbO 3 channel waveguides close to 1.53 μm transition. Electronics Letters. 27(11). 913–914. 64 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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