GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Optica Publishing Group  (16)
  • Xi, Xiaoming  (16)
Material
Publisher
  • Optica Publishing Group  (16)
Person/Organisation
Language
Years
  • 1
    Online Resource
    Online Resource
    Simple method for high average power supercontinuum generation based on Raman mode locking in a quasi-CW fiber laser oscillator
    Optica Publishing Group ; 2022
    In:  Optics Letters Vol. 47, No. 22 ( 2022-11-15), p. 5809-
    Details
    In: Optics Letters, Optica Publishing Group, Vol. 47, No. 22 ( 2022-11-15), p. 5809-
    Abstract: A simple generation method for a supercontinuum (SC) based on Raman mode locking (RML) in a quasi-continuous wave (QCW) fiber laser oscillator is demonstrated experimentally and analyzed in this paper. The power of the SC is adjustable by changing the pump repetition rate and duty cycle. Under the pump repetition rate of 1 kHz and duty cycle of 11.5%, an SC output with a spectral range of 1000–1500 nm is obtained at a maximum output power of 791 W. The RML is fully analyzed in terms of the spectral and temporal dynamics. RML plays a major role in this process and further enriches the generation of the SC. To the best of the authors’ knowledge, this is the first report on directly generating a high and adjustable average power SC using a large-mode-area (LMA)-based oscillator, which provides a proof-of-concept experiment for achieving a high average power SC source and greatly improves the potential application value of the SC source.
    Type of Medium: Online Resource
    ISSN: 0146-9592 , 1539-4794
    URL: Article
    DOI: 10.1364/OL.475730
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2022
    detail.hit.zdb_id: 243290-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Fabrication of a side pump combiner and realization of a 2 kW single mode all-fiber laser oscillator
    Optica Publishing Group ; 2020
    In:  OSA Continuum Vol. 3, No. 5 ( 2020-05-15), p. 1240-
    Details
    In: OSA Continuum, Optica Publishing Group, Vol. 3, No. 5 ( 2020-05-15), p. 1240-
    Abstract: In this paper, we investigate a (2 + 1)×1 side pump combiner with high power handling capability and high beam quality numerically and experimentally. Through theoretical research, we have found how the combiner’s parameters influence its pump coupling efficiency and maximum load power. According to the numerical analysis, we fabricate a side pump combiner, which consists of two pump fibers (220/242 µm, NA = 0.22) and a signal fiber (20/400 µm, NA = 0.06/0.46). The coupling efficiency of the side pump combiner is 97%, which is tested under 2 kW input pump power. Using two side pump combiners and four high power 976 nm laser diodes, a bi-directionally pumped fiber laser oscillator is constructed and tested. The fiber laser oscillator’s maximum output power is 2150 W when injecting 3070 W pump power, corresponding to a slope efficiency of ∼72%. No stimulated Raman scattering or transverse mode instability was observed during the operation test. Thanks to the advantage of maintaining high beam quality of the home-made side pump combiner, this all-fiber laser oscillator achieves single mode laser output (M 2 =1.05) even when the output power increases to more than 2 kW. By further improving the fabrication technique and using larger core fibers, output laser power could be greatly increased, which is very important for high-power fiber lasers.
    Type of Medium: Online Resource
    ISSN: 2578-7519
    URL: Article
    DOI: 10.1364/OSAC.393164
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2020
    detail.hit.zdb_id: 2944048-8
    detail.hit.zdb_id: 3143831-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Near-single-mode 3 kW monolithic fiber oscillator based on a longitudinally spindle-shaped Yb-doped fiber: publisher’s note
    Optica Publishing Group ; 2020
    In:  Optics Letters Vol. 45, No. 21 ( 2020-11-01), p. 5949-
    Details
    In: Optics Letters, Optica Publishing Group, Vol. 45, No. 21 ( 2020-11-01), p. 5949-
    Abstract: This publisher’s note contains corrections to Opt. Lett. 45 , 5792 ( 2020 ) OPLEDP 0146-9592 10.1364/OL.404893 .
    Type of Medium: Online Resource
    ISSN: 0146-9592 , 1539-4794
    URL: Article
    DOI: 10.1364/OL.412749
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2020
    detail.hit.zdb_id: 243290-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Near-single-mode 3  kW monolithic fiber oscillator based on a longitudinally spindle-shaped Yb-doped fiber
    Optica Publishing Group ; 2020
    In:  Optics Letters Vol. 45, No. 20 ( 2020-10-15), p. 5792-
    Details
    In: Optics Letters, Optica Publishing Group, Vol. 45, No. 20 ( 2020-10-15), p. 5792-
    Abstract: In order to balance the mitigation of transverse mode instability and stimulated Raman scattering effect in the high power fiber lasers, a specially designed Yb-doped fiber, named spindle-shaped Yb-doped fiber, was fabricated with a core/cladding diameter of 20/400 µm at both ends and 30/600 µm in the middle. Based on this fiber, an all-fiber laser oscillator was built and over 3 kW near-single-mode ( M 2 factor ∼ 1.3 ) laser was achieved with an optical-to-optical conversion efficiency of 78.4%. While operating at the maximum power, the transverse mode instability is well mitigated and the stimulated Raman scattering effect is well suppressed ( 〉 34 d B lower than signal laser). Further power scaling is promising by optimizing the structure of the Yb-doped fiber.
    Type of Medium: Online Resource
    ISSN: 0146-9592 , 1539-4794
    URL: Article
    DOI: 10.1364/OL.404893
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2020
    detail.hit.zdb_id: 243290-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Demonstration of 3kW × 2 ports bidirectional output oscillating-amplifying integrated fiber laser employing chirped and tilted fiber Bragg gratings for co-SRS suppression
    Optica Publishing Group ; 2023
    In:  Optics Express Vol. 31, No. 17 ( 2023-08-14), p. 28400-
    Details
    In: Optics Express, Optica Publishing Group, Vol. 31, No. 17 ( 2023-08-14), p. 28400-
    Abstract: Bidirectional output oscillating-amplifying integrated fiber laser (B-OAIFL) is a newly developed configuration with many advantages like compactness and good reliability. In this work, a B-OAIFL with a low time-stabilized threshold was constructed by employing a pair of side pump/signal combiner in the oscillating section, which demonstrates smooth temporal characteristics with no pulse detected by the photodetector at the output power level of only a few of tens Watts. We investigated the effect of side pumping on the Raman Stokes light and verified its contribution to mitigating the temporal-chaos-induced stimulated Raman scattering (SRS). The phenomenon of co-SRS caused by the mutual excitation of backward Stokes light from two amplifying sections under bidirectional pumping was first reported and studied. A pair of chirped and tilted fiber Bragg gratings (CTFBGs) were applied between the oscillating and amplifying sections to suppress the co-SRS, and the effect of the number of CTFBGs on the suppression of co-SRS was studied in detail experimentally. Finally, we successfully suppressed the co-SRS, and achieved a 3kW × 2 ports laser output, with a near-single-mode beam quality of M A 2 ∼1.3, M B 2 ∼1.4. In contrast, without the use of CTFBG, only a 2 kW-level output was obtained from each port, limited by co-SRS (with an SRS suppression ratio of less than 15 dB). The maximum output power of end A and end B is 3133 W and 3213 W, with the SRS suppression ratio of about 27.6 dB and 28.1 dB, respectively. No TMI features were observed under bidirectional pumping. The results demonstrate a significant potential for further power scaling based on this configuration. To the best of our knowledge, it is the highest output power achieved based on the B-OAIFL.
    Type of Medium: Online Resource
    ISSN: 1094-4087
    URL: Article
    DOI: 10.1364/OE.494530
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2023
    detail.hit.zdb_id: 1491859-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    High-peak-power pump-modulated quasi-CW fiber laser
    Optica Publishing Group ; 2022
    In:  Applied Optics Vol. 61, No. 7 ( 2022-03-01), p. 1826-
    Details
    In: Applied Optics, Optica Publishing Group, Vol. 61, No. 7 ( 2022-03-01), p. 1826-
    Abstract: Quasi-continuous wave (CW) laser output with high peak power and high energy is preferred in some industrial applications. Due to the non-linear effects and transverse mode instability, such high-peak-power laser output is difficult to achieve via monolithic fiber lasers in CW mode. For diode-pumped monolithic fiber lasers, by applying overshoot pulse modulation to the pumping diodes, we obtain a pulse laser output with a peak power much higher than that in CW mode. In this paper, it has been theoretically studied that stable pulses with the width of µs level can be generated with quasi-CW operation without distortion according to our simulation. We also experimentally demonstrate a bi-directional pumped quasi-CW monolithic fiber laser operating in CW and pulse modes. In quasi-CW mode, by applying overshoot pulse modulation to the diodes, with a frequency of 1 kHz and a pulse width of 100 µs, the peak power of the output laser reached 9713 W with an average power of 898 W and M 2 of 2.4 and 2.3 in the two orthogonal directions, respectively. To the best of our knowledge, this is the very first quasi-CW fiber laser of a 10-kW level with the M 2 level of 2.
    Type of Medium: Online Resource
    ISSN: 1559-128X , 2155-3165
    URL: Article
    DOI: 10.1364/AO.452604
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2022
    detail.hit.zdb_id: 207387-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    Kilowatt random Raman fiber laser with full-open cavity
    Optica Publishing Group ; 2022
    In:  Optics Letters Vol. 47, No. 3 ( 2022-02-01), p. 493-
    Details
    In: Optics Letters, Optica Publishing Group, Vol. 47, No. 3 ( 2022-02-01), p. 493-
    Abstract: Random Raman fiber laser (RRFL) has been widely studied in high-power laser generation due to its special lasing characteristics. However, all previous high-power results are based on the half-open cavity. In this letter, we demonstrate an applicable high-power RRFL with the simplest structure, that is, a full-open cavity. The lasing dynamic and output characteristics are theoretically and experimentally studied. Laser source with multi-longitudinal modes can result in the random laser output from one side even in the full-open cavity. The ratio of the backward output power is mainly determined by the reflectivity of fiber ends. The experimental results show that such a simple structure can easily generate kilowatts of random laser power and is a promising setup to achieve higher output power, which is also an important platform to study the laser dynamic in high-power full-open cavity without any point-action or regular distributed reflectors.
    Type of Medium: Online Resource
    ISSN: 0146-9592 , 1539-4794
    URL: Article
    DOI: 10.1364/OL.443468
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2022
    detail.hit.zdb_id: 243290-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Tapered Yb-doped fiber enabled a 4 kW near-single-mode monolithic fiber amplifier
    Optica Publishing Group ; 2022
    In:  Optics Letters Vol. 47, No. 9 ( 2022-05-01), p. 2162-
    Details
    In: Optics Letters, Optica Publishing Group, Vol. 47, No. 9 ( 2022-05-01), p. 2162-
    Abstract: In this Letter, we demonstrate a monolithic high-power master oscillator power amplifier by using a home-made double-clad tapered Yb-doped fiber (T-YDF) with an input end of ∼20/400 µm and an output end of ∼30/600 µm. Thanks to perfect core/cladding matching with the fiber components at both ends of the T-YDF, the laser is pumped bidirectionally and an output power of over 4 kW with a high slope efficiency of 84.1% and excellent beam quality M 2 ∼ 1.46 is achieved. In contrast to previous work on common fiber lasers, experimental results also reveal that the co-pump scheme has a higher transverse mode instability (TMI) threshold and power-boosting capability than that of a counter-pump scheme. To the best of our knowledge, this is the highest output power demonstrated to date from such a T-YDF with excellent beam quality. This work indicates the great potential of the T-YDF to realize further power scaling, high laser efficiency, and excellent beam quality in high-power fiber lasers.
    Type of Medium: Online Resource
    ISSN: 0146-9592 , 1539-4794
    URL: Article
    DOI: 10.1364/OL.457529
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2022
    detail.hit.zdb_id: 243290-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    Towards a tapered Yb-doped fiber-based narrow linewidth single-mode fiber laser with a high signal to Raman ratio
    Optica Publishing Group ; 2023
    In:  Optics Express Vol. 31, No. 16 ( 2023-07-31), p. 26831-
    Details
    In: Optics Express, Optica Publishing Group, Vol. 31, No. 16 ( 2023-07-31), p. 26831-
    Abstract: We demonstrate an all-fiber high-power narrow-linewidth fiber laser based on a homemade tapered Yb-doped fiber (T-YDF). The laser performance is investigated and systematically compared with different seed powers and pump manners. The experimental results reveal that the injected seed power requires a trade-off designed to take into account the impact of spectral broadening, nonlinear effects, and transverse mode instability (TMI). Compared with the co-pump manner, the counter-pump manner performs well in inhibiting nonlinearities, spectral broadening, and improving the TMI threshold. Under the counter-pump manner, this narrow-linewidth T-YDF amplifier realized a 2.09 kW output power with a 3 dB spectral linewidth of ∼0.34 nm, a beam quality of M 2 ∼1.28 and a high Raman suppression ratio over 53.5 dB, the highest reported power for such a T-YDF-based narrow-linewidth single-mode laser, to the best of our knowledge. This work provides a promising pathway towards implementing monolithic high-power narrow-linewidth single-mode fiber lasers.
    Type of Medium: Online Resource
    ISSN: 1094-4087
    URL: Article
    DOI: 10.1364/OE.491385
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2023
    detail.hit.zdb_id: 1491859-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    2 × 2 kW near-single-mode bidirectional high-power output from a single-cavity monolithic fiber laser
    Optica Publishing Group ; 2022
    In:  Optics Letters Vol. 47, No. 11 ( 2022-06-01), p. 2806-
    Details
    In: Optics Letters, Optica Publishing Group, Vol. 47, No. 11 ( 2022-06-01), p. 2806-
    Abstract: Traditional monolithic fiber lasers can only achieve unidirectional high-power laser output. In this Letter, a novel high-power linear cavity fiber laser that can achieve bidirectional high-power output is proposed and demonstrated. In an ordinary laser resonant cavity, we replace the high-reflectivity fiber Bragg grating with a low-reflectivity fiber Bragg grating to realize bidirectional laser output. In our experiment, the laser cavity was composed of two fiber Bragg gratings with a reflectivity of about 10%. The pump power provided by the 976 nm laser diodes was injected into a double-clad Yb-doped fiber with core/cladding diameters of 20/400 µm. At the maximum pump power, the bidirectional output powers were 2025 W and 1948 W, respectively, and the output laser beam quality (M 2 factor) at both ends was about 1.5. For the first time, to the best of our knowledge, the feasibility of a bidirectional output fiber laser that can achieve double high (2-kW-level) power was verified. Compared with a traditional unidirectional output laser, this type of bidirectional output laser can achieve a double high-power laser by employing a laser resonant cavity. Thus, the average cost and structure size can be further reduced in mass production.
    Type of Medium: Online Resource
    ISSN: 0146-9592 , 1539-4794
    URL: Article
    DOI: 10.1364/OL.458581
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2022
    detail.hit.zdb_id: 243290-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...