High power, high efficiency diode pumped Raman fiber laser

Glick, Yaakov; Fromzel, V. A.; Zhang, Jun; Dahan, Asaf; Ter‐Gabrielyan, Nikolay; Pattnaik, R.; Dubinskii, Mark

doi:10.1088/1612-2011/13/6/065101

Cited by 48 publications

(23 citation statements)

References 18 publications

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“…Similarly stimulated Raman scattering (SRS) leads to Stokes beam cleaning. It has permitted to demonstrate good beam quality Raman fiber lasers pumped by multimode solidstate lasers [25] and diode lasers [26,27], with output CW powers larger than 50 W. Moreover combination and cleanup of several laser beams have been demonstrated via SRS in multimode fibers [28].…”

Section: Introductionmentioning

confidence: 99%

Kerr self-cleaning of pulsed beam in an ytterbium doped multimode fiber

Guenard¹,

Krupa²,

Dupiol³

et al. 2017

Opt. Express

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We experimentally demonstrate that Kerr spatial self-cleaning of a pulsed beam can be obtained in an amplifying multimode optical fiber. An input peak power of 500 W only was sufficient to produce a quasi-single-mode emission from the double-clad ytterbium doped multimode fiber (YMMF) with non-parabolic refractive index profile. We compare the self-cleaning behavior observed in the same fiber with loss and with gain. Laser gain introduces new opportunities to achieve spatial self-cleaning of light in multimode fibers at a relatively low power threshold.

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Section: Introductionmentioning

confidence: 99%

Kerr self-cleaning of pulsed beam in an ytterbium doped multimode fiber

Guenard¹,

Krupa²,

Dupiol³

et al. 2017

Opt. Express

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“…First direction continues the study initiated in Ref. [5] with a focus on the opportunities of high-quality beam generation using fiber Bragg gratings (FBGs) as cavity mirrors [7][8][9][10] , whereas second one aims at high-power capabilities based on freespace pump coupling and bulk mirrors cavity [4,11,12] . In the last case, up to 154 W power is obtained at ∼1020 nm [12] , but Raman output at this wavelength is not as interesting, because higher power and narrower linewidth are available from YDFLs [13,14] .…”

Section: S a Babinmentioning

confidence: 99%

High-brightness all-fiber Raman lasers directly pumped by multimode laser diodes

Babin

2019

High Pow Laser Sci Eng

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High-brightness fiber laser sources usually utilize active rare-earth-doped fibers cladding-pumped by multimode laser diodes (LDs), but they operate in limited wavelength ranges. Singlemode-passive-fiber based Raman lasers are able to operate at almost any wavelength being pumped by high-power fiber lasers. One of the interesting possibilities is to directly pump graded-index (GRIN) multimode passive fibers by available high-power multimode LDs at 915–940 nm, thus achieving high-power Raman lasing in the wavelength range of 950–1000 nm, which is problematic for rare-earth-doped fiber lasers. Here we review the latest results on the development of all-fiber high-brightness LD-pumped sources based on GRIN fiber with in-fiber Bragg gratings (FBGs). The mode-selection properties of FBGs inscribed by fs pulses supported by the Raman clean-up effect result in efficient conversion of multimode pump into a high-quality output beam at 9xx nm. GRIN fibers with core diameters 62.5, 85 and $100~\unicode[STIX]{x03BC}\text{m}$ are compared. Further scaling capabilities and potential applications of such sources are discussed.

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“…Then higher power output is acquired through fiber lasers employing integrated Yb-Raman gain [12][13][14], nevertheless the brightness decreases in the Raman shifting process and the issues of PD reappear which will influence the performance of laser system. Recently the fast development of fiber components and the brightness enhancement of pump lasers make it possible for power scaling in passive fibers that employ pure Raman gain [15][16][17][18][19][20][21][22]. For instance, using graded-index (GRIN) fiber in core-pumped structure has a relatively simple construction and enhances the brightness in fiber core.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, using graded-index (GRIN) fiber in core-pumped structure has a relatively simple construction and enhances the brightness in fiber core. In 2016, Y. Glick et al report an LD-pumped Raman fiber laser in free space configuration which obtain 80 W Raman laser output, and brightness enhancement is achieved through the beam clean-up procedure of GRIN fiber in the cavity [18]. Then by means of modifying the system and adding up pump energy the lasing power increases to 154 W [19].…”

Section: Introductionmentioning

confidence: 99%

Pure Passive Fiber Enabled Highly Efficient Raman Fiber Amplifier With Record Kilowatt Power

Chen

Leng

et al. 2019

IEEE Access

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Kilowatt-level high efficiency all-fiberized Raman fiber amplifier based on pure passive fiber is proposed for the first time in this paper. The laser system is established on master oscillator power amplification configuration while a piece of graded-index passive fiber is utilized as stokes shifting as well as gain medium, which is entirely irrelevant to rare-earth-doped gain mechanism. When the pump power is 1368.8 W, we obtained 1002.3 W continuous-wave laser power at 1060 nm with the corresponding opticalto-optical efficiency of 84%. The beam parameter M 2 improves from 9.17 of the pump laser to 5.11 of the signal laser through the amplification process, and the brightness enhancement is about 2.57 at maximum output power as a consequence of the beam clean-up process in the graded-index fiber. To the best of our knowledge, we have demonstrated the first kilowatt-level high efficiency Raman fiber amplifier based on pure passive fiber with brightness enhancement.INDEX TERMS Fiber lasers, fiber nonlinear optics, high power amplifiers, Raman scattering.

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High power, high efficiency diode pumped Raman fiber laser

Cited by 48 publications

References 18 publications

Kerr self-cleaning of pulsed beam in an ytterbium doped multimode fiber

Kerr self-cleaning of pulsed beam in an ytterbium doped multimode fiber

High-brightness all-fiber Raman lasers directly pumped by multimode laser diodes

Pure Passive Fiber Enabled Highly Efficient Raman Fiber Amplifier With Record Kilowatt Power

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