High-power, low-noise, Yb-doped, cladding-pumped, three-level fiber sources at 980nm

Selvas, R.; Sahu, J.K.; Fu, Libin; Jang, Joo‐Nyung; Nilsson, Johan; Grudinin, A.B.; Yla-Jarkko, K.H.; Alam, Shaif-ul; Turner, P.W.; Moore, J.

doi:10.1364/ol.28.001093

Cited by 89 publications

(32 citation statements)

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“…However, achieving high-power tunable laser output has long been a great challenge in three-level transition in Nd-doped fiber lasers. Similar to the well-known challenges in three-level transition operation of Yb-doped double cladding fiber lasers [1], operating three-level transition in Nd-doped double cladding fiber lasers also has great difficulty not only due to the existence of undesired extremely serious competition with four-level F -I transition when pumped at 808 nm, but also due to the very poor overlap between pump and signal. Hence, laser operations of the F -I transition in Nd-doped optical fibers have been limited to low power.…”

Section: Introductionmentioning

confidence: 94%

Compact high-power tunable three-level operation of double cladding Nd-doped fiber laser

Ibsen

Richardson

et al. 2005

IEEE Photon. Technol. Lett.

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Abstract-We present a compact high-power continuous-wave tunable neodymium-doped double cladding fiber laser operating on three-level 4 F 3 2 -4 I 9 2 transition with a maximum output power up to 810 mW. At 926.7 nm, it has a maximum slope efficiency of 49.3% against absorbed 808-nm pump. By compressing the fiber Bragg grating, 15-nm tuning range is achieved.Index Terms-Double-cladding fiber laser, Nd fiber laser, threelevel transition, tunable laser.

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Section: Introductionmentioning

confidence: 94%

Compact high-power tunable three-level operation of double cladding Nd-doped fiber laser

Ibsen

Richardson

et al. 2005

IEEE Photon. Technol. Lett.

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“…Thus, one can expect that if a fiber is given in an SICF form and its core is uniformly doped with active ions, the γs of the fundamental mode is invariably higher than that of the LCVM [22]. Consequently, the lasing threshold of the fundamental mode is always lower than that of the LCVM unless any additional mode discrimination mechanism is provided [21,23] [see Eq.…”

Section: Theorymentioning

confidence: 99%

Rigorous Analysis on Ring-Doped-Core Fibers for Generating Cylindrical Vector Beams

Kim

Kwon

Vazquez-Zuniga

et al. 2014

Journal of the Optical Society of Korea

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We propose a novel active fiber design for selectively generating cylindrical vector beams (CVBs) or cylindrical vector modes (CVMs) which can be applied to conventional fiber lasers. A fiber is designed to have a ring-shaped core refractive index profile which can lead to the best overlap between the active dopant distribution profile and the lowest-order CVM (LCVM) field profile. Therefore, the overlap factor (OVF) of the LCVM becomes even higher than that of the fundamental mode. We emphasize that this condition cannot be satisfied by a conventional step-index core fiber (SICF) but by the ring-doped core fiber (RDCF). Because the lasing threshold is inversely proportional to the OVF, the LCVM can predominantly be stimulated even without going through special procedures to impose extra loss mechanisms to the fundamental mode. We numerically verify that the OVF of the LCVM with the doped ions can significantly exceed that of the fundamental mode if the proposed fiber design is applied. In addition, an RDCF of the proposed fiber design can also operate in a regime containing no higher-order modes besides the LCVM, so that it can selectively and efficiently generate the LCVM without being disrupted by the parasitic lasing of the higher-order modes. We highlight that an optimized RDCF can lead to a >30 % higher OVF ratio than a SICF having the same doped area. The proposed model is expected to be useful for enhancing the efficiency of generating CVBs in an all-fiber format.

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“…However, gain competition between the pure three-level transition and quasi-four-level laser operation at longer wavelengths is a major problem for operation on this zero-phonon line. To overcome this difficulty, fibers with non-standard geometries need to be carefully designed [9,10]. Furthermore, Yb-doped fiber lasers cannot be operated at wavelengths much below 970 nm.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient frequency doubling and quadrupling of a short-pulsed thulium fiber laser

Liang

et al. 2018

Appl. Phys. B

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We report the second harmonic generation and fourth harmonic generation of the output from a short-pulsed (~ 80 ps) thulium-doped fiber laser, generating 976 and 488 nm wavelengths with high efficiency. With a narrow-linewidth (0.5 nm) pump at a power of 3.2 W, a second harmonic power of 2.4 W was generated at 976 nm with a conversion efficiency reaching 75%. For FHG, 690 mW of power at 488 nm was obtained from frequency doubling of 976 nm with a conversion efficiency of 30%.

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High-power, low-noise, Yb-doped, cladding-pumped, three-level fiber sources at 980nm

Cited by 89 publications

References 0 publications

Compact high-power tunable three-level operation of double cladding Nd-doped fiber laser

Compact high-power tunable three-level operation of double cladding Nd-doped fiber laser

Rigorous Analysis on Ring-Doped-Core Fibers for Generating Cylindrical Vector Beams

Highly efficient frequency doubling and quadrupling of a short-pulsed thulium fiber laser

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