Ultracompact cladding-pumped 35-mm-short fiber laser with 4.7-W single-mode output power

Li, L.; Schülzgen, Axel; Temyanko, V. L.; Morrell, M. M.; Sabet, S.; Li, H.; Moloney, Jerome V.; Peyghambarian, N.

doi:10.1063/1.2196053

Cited by 39 publications

(14 citation statements)

References 15 publications

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“…By contrast, soft glass can be very heavily doped without exerting any other detrimental effect 16 , and its refractive indices can be easily adjusted. Thus, soft glass is a promising medium for PCF 17,18 .In this paper, we demonstrate for the first time a phosphate Yb/Er co-doped single-mode AS-PCF with Wattlevel output power and 20 mm core diameter. Using the finite-difference time-domain method, we also confirm that a single-mode AS-PCF with up to 40 mm core diameter can be realized using an index-depressed active core based on the concept of higher-order-mode (HOM) delocalization.…”

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confidence: 87%

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Yb/Er co-doped phosphate all-solid single-mode photonic crystal fiber

Wang

Feng

et al. 2014

Sci Rep

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An all-solid Yb 31 /Er 31 co-doped single-mode phosphate photonic crystal fiber (PCF) with Watt-level output power and 20 mm core diameter is demonstrated for the first time. A PCF whose refractivity of the active core is lower than that of the background glass is suggested and theoretically confirmed to be in single-mode operation at 40 mm core diameter.F ibers with short length and large mode area (LMA) are some of the most extensively investigated subjects in high-power fiber lasers and amplifiers 1 . On one hand, LMA fibers can withstand considerably higher energy without end-face damage and can effectively increase the threshold of nonlinear effects. Many solutions have been suggested to overcome the limitation of the core diameter in a traditional step-index fiber, including chirally-coupled-core (CCC) fibers 2 , leaky channel fibers 3 , gain-guiding fibers 4 , all-solid photonic bandgap fibers 5 , and so forth. Among them, photonic crystal fibers (PCFs) 6,7 are some of the most promising designs for extending the core diameter of a single-mode LMA fiber. In fact, LMA-PCFs with core sizes approaching 100 mm have already been demonstrated 8 , thereby indicating the scalability of the core diameter in this kind of design. However, the presence of hollows in a traditional LMA-PCF causes difficulty in splicing PCFs to commercially available fiber-coupled devices and thus realizing an all-fiber laser system. Consequently, the industrial applications of LMA-PCFs are limited. To address this problem, a PCF with an all-solid (AS) microstructure has been suggested and realized 9 . The hollows of this PCF are replaced by another kind of glass, making the all-fiber laser system possible. After then, an Nd-doped silicate AS-PCF 10 and a single-mode Nd-doped phosphate AS-PCF with up to 40 mm core diameter are realized 11 .On the other hand, a short-length fiber can weaken the nonlinear effects and make a laser system more compact. A straightforward method of shortening fiber length is to heavily dope the active core. However, for the extensively used silica PCFs 12,13 , the solubility of rare-earth ions such as Yb 2 O 3 cannot be substantially increased prior to the onset of other deleterious effects, such as quenching, phase separation, and devitrification 14,15 . In addition, when the core is highly doped, matching the refractive indexes between the photonic crystal cladding and the active core is difficult for silica glass, which decreases the core diameter scalability of the PCF. By contrast, soft glass can be very heavily doped without exerting any other detrimental effect 16 , and its refractive indices can be easily adjusted. Thus, soft glass is a promising medium for PCF 17,18 .In this paper, we demonstrate for the first time a phosphate Yb/Er co-doped single-mode AS-PCF with Wattlevel output power and 20 mm core diameter. Using the finite-difference time-domain method, we also confirm that a single-mode AS-PCF with up to 40 mm core diameter can be realized using an index-depressed active core based on the conc...

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confidence: 87%

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confidence: 99%

Yb/Er co-doped phosphate all-solid single-mode photonic crystal fiber

Wang

Feng

et al. 2014

Sci Rep

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“…FBGs allow fine control of fiber laser cavity by finely tuning their distributed reflectivity. This potential is strategic in the optimal design of both conventional and MOF fiber lasers [38][39][40][41][42][43][44][45] and therefore in the design of DBR and DFB laser sensors.…”

Section: Fiber Bragg Grating Sensorsmentioning

confidence: 99%

Advances on Optical Fiber Sensors

Mescia

Prudenzano

2013

Fibers

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In this review paper some recent advances on optical fiber sensors are reported. In particular, fiber Bragg grating (FBG), long period gratings (LPGs), evanescent field and hollow core optical fiber sensors are mentioned. Examples of recent optical fiber sensors for the measurement of strain, temperature, displacement, air flow, pressure, liquid-level, magnetic field, and the determination of methadone, hydrocarbons, ethanol, and sucrose are briefly described.

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“…The cores are heavily co-doped with Er 3+ and Yb 3+ ions to lase at the telecom wavelength of ~1.5 µm for short-length high-power fiber laser applications. 15 The gain fiber is a piece of very short (~10 cm) MCF that is cleaved at both ends. The pump light is injected into the MCF inner cladding by butt coupling a multimode pump-delivery fiber, which has a broadband high-reflector (at ~1.5 µm) coated on its facet, against one MCF end.…”

Section: Determination Of the Passive Fiber Lengthmentioning

confidence: 99%

An all-fiber approach for in-phase supermode phase-locked operation of multicore fiber lasers

Schülzgen

Temyanko

et al. 2007

Fiber Lasers IV: Technology, Systems, and Applications

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An all-fiber approach is utilized to phase lock and select the in-phase supermode of compact multicore fiber lasers. Based on the principles of Talbot imaging and waveguide multimode interference, the fundamental supermode is selectively excited within a completely monolithic fiber device. The all-fiber device is constructed by simply fusion splicing passive non-core optical fibers of controlled lengths at both ends of a piece of multicore fiber. Experimental results upon in-house-made 19-and 37-core fibers are demonstrated, which generate output beams with high-brightness far-field intensity distributions. The whole fabricated multicore fiber laser device can in principle be a single fiber chain that is only ~10 cm in length, aligning-free in operation, and robust against environmental disturbance.

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Ultracompact cladding-pumped 35-mm-short fiber laser with 4.7-W single-mode output power

Cited by 39 publications

References 15 publications

Yb/Er co-doped phosphate all-solid single-mode photonic crystal fiber

Yb/Er co-doped phosphate all-solid single-mode photonic crystal fiber

Advances on Optical Fiber Sensors

An all-fiber approach for in-phase supermode phase-locked operation of multicore fiber lasers

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