PM double-clad fibers for high-power lasers and amplifiers

Tankala, K.; Carter, Adrian; Machewirth, D.; Farroni, J.; Abramczyk, Jaroslaw; Manyam, Upendra H.

doi:10.1117/12.501679

Cited by 12 publications

(11 citation statements)

References 13 publications

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“…If LMA PM-DCF's were to be feasible, considerable research had to be performed in order to optimize the compositional and the geometrical design of the stress members. In 2003 the results of such detailed experimental and theoretical analyses were reported [10,29]. 5 shows the key dimensional parameters that determine the birefringence that can be obtained in a PM-DCF.…”

Section: Panda Pm Fiber Designmentioning

confidence: 99%

“…It is therefore advantageous to be able to combine the beams from multiple fibers and this in turn makes it desirable for the fiber to also be polarization maintaining. This provides yet another layer of complexity to the fiber design but such fibers are now a commercial reality [10] and we will discuss the various criteria that are critical for designing these PM double clad fibers.…”

Section: Introductionmentioning

confidence: 99%

“…Limiting birefringence using standard and high birefringence rods in SM and LMA fibers for different stress-rod locations (a) location 1 and (b) location 2[10].…”

mentioning

confidence: 99%

“…Geometric considerations in a PM-DCF[10]. Birefringence and beat-length of PM-DCF's as a function of (a) stress rod size and (b) location[10].…”

mentioning

confidence: 99%

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The road to kilowatt fiber lasers

Carter¹,

Samson²,

Tankala³

et al. 2004

SPIE Proceedings

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Although fiber amplifiers have been employed in communications systems for many years, until very recently the fiber laser was little more than a scientific curiosity. However the fiber laser format has a number of intrinsic advantages over lamp and diode pumped YAG lasers including size, reliability, wavelength selectivity, heat dissipation, wallplug efficiency and operational cost; and with kiloWatt output powers now possible fiber lasers are beginning to replace lamp and diode pumped YAG lasers in many industrial applications. In this paper we review the recent and ongoing advances in fiber design that have facilitated this revolution.

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Section: Panda Pm Fiber Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The road to kilowatt fiber lasers

Carter¹,

Samson²,

Tankala³

et al. 2004

SPIE Proceedings

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“…It is therefore advantageous to be able to coherently combine the beams from multiple fibers and this it turns makes it desirable for the fiber to also be polarization maintaining. This provides yet another layer of complexity to the fiber design but such fibers are now a commercial reality [6]. In this paper we review the recent and ongoing advances in fiber design that is facilitating the development and production of lasers and amplifiers with ever increasing output powers.…”

mentioning

confidence: 99%

<title>Continued advancements in the design of double clad fibers for use in high output fiber lasers and amplifiers</title>

Carter¹,

Tankala²,

Samson³

et al. 2004

SPIE Proceedings

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Fiber lasers have a number of distinct advantages over their more conventional solid state laser alternatives. These advantages include size, reliability, wavelength selectivity, heat dissipation, wall plug efficiency and operational cost. Furthermore they can be operated without the need for active cooling or optical alignment. Consequently the market for these more traditional laser sources are beginning to be eroded by the emergence of fiber lasers.In 1999 high power fiber lasers became a reality, with the world's first single-mode fiber laser exhibiting in excess of I 00W cw output [ I I . However it was soon recognized that conventional small core, high NA fiber designs were not appropriate to applications requiring further scaling of the output power [2]. More specifically it was found that the maximum achievable output power in such fibers were restricted by a fundamental susceptibility to optical nonlinearities, including stimulated Raman scattering (SRS), stimulated Brillouin scattering (SBS) and self-phase modulation. In order to overcome the limitations imposed by these parasitic nonlinear processes, it has been necessary to develop fibers with high rare-earth dopant concentrations in relatively large core, low numerical aperture fibers. These so-called large mode area (LMA) fibers are directly responsible for the recent explosion in demonstrated diffraction-limited beam quality output powers, now approaching the kW-level from a single fiber [3, 4, 5].To further scale the output power it is necessary to combine the output of several fiber lasers. Indeed, for a number of industrial and military applications it is desirable to scale the total output power to between several and hundreds of kW's. It is therefore advantageous to be able to coherently combine the beams from multiple fibers and this it turns makes it desirable for the fiber to also be polarization maintaining. This provides yet another layer of complexity to the fiber design but such fibers are now a commercial reality [6]. In this paper we review the recent and ongoing advances in fiber design that is facilitating the development and production of lasers and amplifiers with ever increasing output powers.

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