Analysis of W-type waveguide for Nd-doped fiber laser operating near 940 nm

Yoo, Seongwoo; Soh, Daniel B. S.; Kim, J.; Jung, Yongmin; Nilsson, Johan; Sahu, J.K.; Lee, Jhang W.; Oh, Kyunghwan

doi:10.1016/j.optcom.2004.11.037

Cited by 30 publications

(7 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To realize the Nd:fiber laser working at ∼900 nm, the main problem is that the radiation is severely overwhelmed by the four-level transition at ∼1080 nm because of its low lasing threshold and high efficiency at room temperature [5,6]. In previous studies, three possible solutions were demonstrated: (1) to take advantage of Nd-doped fiber with special doping concentration of Neodymium [7] or other elements, such as aluminum and germanium [8]; (2) to exploit a specially designed fiber structure, including photonic bandgap fiber [9] and W-type Nd-doped double cladding fiber as gain medium [10][11][12]; and (3) to cool down the Nddoped fiber in liquid nitrogen [13]. All of these schemes can help to suppress the emission at ∼1080 nm and thus enhance that at ∼900 nm.…”

mentioning

confidence: 99%

Core-pumped femtosecond Nd:fiber laser at 910 and 935 nm

et al. 2014

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 99%

Core-pumped femtosecond Nd:fiber laser at 910 and 935 nm

et al. 2014

View full text Add to dashboard Cite

show abstract

“…In addition, it is easy to splice this fiber type with the standard step index fiber (SIF) and hence it becomes appropriate for all fiber laser systems. The W-type index structure has been already considered for ytterbium-doped fiber laser operating at 1.077µm [17], erbium-doped fiber amplifier at S-band [18], Neodymium-doped fiber laser at 914nm [19], and a bismuthdoped germanosilicate fiber laser in E band [20].…”

Section: Introductionmentioning

confidence: 99%

Designing a W-type index praseodymium-doped chalcogenide fiber for strongly-efficient MIR Laser beyond 4 μm

Khamis

QaisAlAbbasi

2022

Int. j. electr. comput. eng. syst. (Online)

View full text Add to dashboard Cite

This study is to propose an efficient design based on W-type index praseodymium (Pr 3+ )-doped chalcogenide fiber to enhance the emission of mid-infrared (MIR) wavelength beyond 4 μm. The advantage of the proposed design is to enlarge the core diameter to 32 μm under single mode guidance in order to restrict any impacts of nonlinearity and enhance the applied pumping power before the damage threshold. The effective mode field areas are about 979 μm 2 and 812 μm 2 at 4.5μm emitted MIR wavelength and 2.04μm pump wavelength, respectively. In the considered laser layout within this paper, a single pair of Fiber Bragg Gratings FBGs lay is adopted in the overlapping area of the emitting cross-sections parts of Pr 3+ ions in the transitions ( 3 F 2 , 3 H 6 → 3 H 5 and 3 H 5 → 3 H 4 ). This selected laser layout avoids the difficulties in the fabrication of concatenated FBGs in Pr 3+ -doped chalcogenide glass fibers. In addition, the efficiency of the laser can be also enhanced at this laser layout by emitting two photons in MIR wavelengths from one excited ion. The simulation outcomes indicate the possibility to exceed 61% of slope efficiency at 4.5 μm for 1dB/m loss in the fiber.

show abstract

“…Engineers of Lightwave Electronics (Mountain View, CA) reported a W-type erbium-doped fiber (EDF) operating in S-band [8] , which opened up a new field of EDF positive devices. Various S-band EDFAs and EDFLs based on W-type EDF have been reported from then on [9][10][11] . Besides the W-type EDFAs and EDFLs, researchers of Southampton University also reported a W-type neodymium-doped fiber laser operating around 940 nm [9] .…”

mentioning

confidence: 99%

“…Various S-band EDFAs and EDFLs based on W-type EDF have been reported from then on [9][10][11] . Besides the W-type EDFAs and EDFLs, researchers of Southampton University also reported a W-type neodymium-doped fiber laser operating around 940 nm [9] . In this paper, we systematically study the light propagation theory of W-type fibers, which provides a theoretical guidance for the design and fabrication of W-type fibers.…”

mentioning

confidence: 99%