Ria G Kramer
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Explore the profile of Ria G Kramer including associated specialties, affiliations and a list of published articles.
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Articles
18
Citations
26
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Recent Articles
1.
Yu H, Sciara S, Chemnitz M, Montaut N, Crockett B, Fischer B, et al.
Nat Commun
. 2025 Jan;
16(1):171.
PMID: 39747018
High-dimensional photon states (qudits) are pivotal to enhance the information capacity, noise robustness, and data rates of quantum communications. Time-bin entangled qudits are promising candidates for implementing high-dimensional quantum communications...
2.
Cook J, Sincore A, Vail N, Kramer R, Goebel T, Roumayah P, et al.
Opt Express
. 2023 Sep;
31(18):29245-29254.
PMID: 37710729
We detail the design and performance of a high efficiency in-band pumped thulium fiber amplifier operating at the 100 W level. Using a novel pumping architecture based on three incoherently...
3.
Perevezentsev E, Per Siems M, Richter D, Mukhin I, Kramer R, Gorokhov A, et al.
Opt Express
. 2023 May;
31(9):14286-14298.
PMID: 37157296
The first steps towards the development and characterization of next-generation chirped volume Bragg gratings (CVBGs) by means of fs laser inscription were made. Based on the phase mask inscription technique...
4.
Bartnick M, Bharathan G, Goebel T, Kramer R, Nolte S, Bres C
Opt Lett
. 2022 Apr;
47(8):2085-2088.
PMID: 35427343
We report the development of a widely tunable mode-locked thulium-doped fiber laser based on a robust chirped fiber Bragg grating (CFBG). By applying mechanical tension and compression to the CFBG,...
5.
Imogore T, Kramer R, Goebel T, Matzdorf C, Richter D, Nolte S
Opt Lett
. 2020 Dec;
45(23):6526-6529.
PMID: 33258853
We present the tuning of the dispersion properties of a femtosecond (fs) laser inscribed chirped fiber Bragg grating (CFBG), realized by selectively modifying the refractive index of the already inscribed...
6.
Kramer R, Moller F, Matzdorf C, Goebel T, Strecker M, Heck M, et al.
Opt Lett
. 2020 Mar;
45(6):1447-1450.
PMID: 32163988
We present highly robust fiber Bragg gratings (FBGs) in passive large-mode-area fibers for kilowatt fiber laser systems. The gratings were inscribed directly through the fiber coating using near-infrared femtosecond laser...
7.
Heck M, Kramer R, Ullsperger T, Goebel T, Richter D, Tunnermann A, et al.
Opt Lett
. 2019 Aug;
44(16):3980-3983.
PMID: 31415527
We present efficient long period fiber gratings written with femtosecond laser pulses at 800 nm and an amplitude mask, to the best of our knowledge, for the first time. The...
8.
Heck M, Schwartz G, Kramer R, Richter D, Goebel T, Matzdorf C, et al.
Opt Express
. 2019 Mar;
27(4):4292-4303.
PMID: 30876046
We report on the detailed investigation of the core to cladding mode coupling in femtosecond-written long period fiber gratings (LPFG). It is shown that the excitation of higher-order cladding modes...
9.
Kramer R, Matzdorf C, Liem A, Bock V, Middents W, Goebel T, et al.
Opt Lett
. 2019 Feb;
44(4):723-726.
PMID: 30767971
We investigate the high-power durability of fiber Bragg gratings written directly into an ytterbium-doped large mode area fiber using ultrashort laser pulses. The gratings were successfully integrated as a high...
10.
Goebel T, Bharathan G, Ams M, Heck M, Kramer R, Matzdorf C, et al.
Opt Lett
. 2018 Aug;
43(15):3794-3797.
PMID: 30067681
We demonstrate the fabrication of aperiodic fiber Bragg gratings (AFBGs) for their application as filter elements. Direct inscription was performed by focusing ultrashort laser pulses with an oil-immersion objective into...