Tags

Type your tag names separated by a space and hit enter

2nd-order random lasing in a multimode diode-pumped graded-index fiber.
Sci Rep. 2018 Nov 30; 8(1):17495.SR

Abstract

Raman lasing in a graded-index fiber (GIF) attracts now great deal of attention due to the opportunity to convert high-power multimode laser diode radiation into the Stokes wave with beam quality improvement based on the Raman clean-up effect. Here we report on the cascaded Raman generation of the 2nd Stokes order in the 1.1-km long GIF with 100-μm core directly pumped by 915-nm diodes. In the studied all-fiber scheme, the 1st Stokes order is generated at 950-954 nm in a linear cavity formed at GIF ends by two fiber Bragg gratings (FBGs) securing beam quality improvement from M2 ≈ 30 to M2 ≈ 2.3 due to special transverse structure of FBGs. The 2nd Stokes wave is generated either in linear (two FBGs) or half-open (one FBG) cavity with random distributed feedback via Rayleigh backscattering. Their comparison shows that the random lasing provides better beam quality and higher slope efficiency. Nearly diffraction limited beam (M2 ≈ 1.6) with power up to 27 W at maximum gain (996 nm), and 17 W at the detuned wavelength of 978 nm has been obtained, thus demonstrating that the 2nd-order random lasing in diode-pumped GIF with FBGs provides high-efficiency high-quality beam generation in a broad wavelength range within the Raman gain spectral profile.

Authors+Show Affiliations

Institute of Automation and Electrometry SB RAS, Novosibirsk, 630090, Russia.Institute of Automation and Electrometry SB RAS, Novosibirsk, 630090, Russia.Institute of Automation and Electrometry SB RAS, Novosibirsk, 630090, Russia.Institute of Automation and Electrometry SB RAS, Novosibirsk, 630090, Russia. Novosibirsk State University, Novosibirsk, 630090, Russia.Institute of Automation and Electrometry SB RAS, Novosibirsk, 630090, Russia. Novosibirsk State University, Novosibirsk, 630090, Russia.Institute of Automation and Electrometry SB RAS, Novosibirsk, 630090, Russia. Novosibirsk State University, Novosibirsk, 630090, Russia.Institute of Automation and Electrometry SB RAS, Novosibirsk, 630090, Russia. babin@iae.nsk.su. Novosibirsk State University, Novosibirsk, 630090, Russia. babin@iae.nsk.su.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30504776

Citation

Evmenova, Ekaterina A., et al. "2nd-order Random Lasing in a Multimode Diode-pumped Graded-index Fiber." Scientific Reports, vol. 8, no. 1, 2018, p. 17495.
Evmenova EA, Kuznetsov AG, Nemov IN, et al. 2nd-order random lasing in a multimode diode-pumped graded-index fiber. Sci Rep. 2018;8(1):17495.
Evmenova, E. A., Kuznetsov, A. G., Nemov, I. N., Wolf, A. A., Dostovalov, A. V., Kablukov, S. I., & Babin, S. A. (2018). 2nd-order random lasing in a multimode diode-pumped graded-index fiber. Scientific Reports, 8(1), 17495. https://doi.org/10.1038/s41598-018-35767-9
Evmenova EA, et al. 2nd-order Random Lasing in a Multimode Diode-pumped Graded-index Fiber. Sci Rep. 2018 Nov 30;8(1):17495. PubMed PMID: 30504776.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - 2nd-order random lasing in a multimode diode-pumped graded-index fiber. AU - Evmenova,Ekaterina A, AU - Kuznetsov,Alexey G, AU - Nemov,Ilya N, AU - Wolf,Alexey A, AU - Dostovalov,Alexandr V, AU - Kablukov,Sergey I, AU - Babin,Sergey A, Y1 - 2018/11/30/ PY - 2018/07/13/received PY - 2018/11/09/accepted PY - 2018/12/4/entrez PY - 2018/12/7/pubmed PY - 2018/12/7/medline SP - 17495 EP - 17495 JF - Scientific reports JO - Sci Rep VL - 8 IS - 1 N2 - Raman lasing in a graded-index fiber (GIF) attracts now great deal of attention due to the opportunity to convert high-power multimode laser diode radiation into the Stokes wave with beam quality improvement based on the Raman clean-up effect. Here we report on the cascaded Raman generation of the 2nd Stokes order in the 1.1-km long GIF with 100-μm core directly pumped by 915-nm diodes. In the studied all-fiber scheme, the 1st Stokes order is generated at 950-954 nm in a linear cavity formed at GIF ends by two fiber Bragg gratings (FBGs) securing beam quality improvement from M2 ≈ 30 to M2 ≈ 2.3 due to special transverse structure of FBGs. The 2nd Stokes wave is generated either in linear (two FBGs) or half-open (one FBG) cavity with random distributed feedback via Rayleigh backscattering. Their comparison shows that the random lasing provides better beam quality and higher slope efficiency. Nearly diffraction limited beam (M2 ≈ 1.6) with power up to 27 W at maximum gain (996 nm), and 17 W at the detuned wavelength of 978 nm has been obtained, thus demonstrating that the 2nd-order random lasing in diode-pumped GIF with FBGs provides high-efficiency high-quality beam generation in a broad wavelength range within the Raman gain spectral profile. SN - 2045-2322 UR - https://www.unboundmedicine.com/medline/citation/30504776/2nd_order_random_lasing_in_a_multimode_diode_pumped_graded_index_fiber_ L2 - http://dx.doi.org/10.1038/s41598-018-35767-9 DB - PRIME DP - Unbound Medicine ER -
Try the Free App:
Prime PubMed app for iOS iPhone iPad
Prime PubMed app for Android
Prime PubMed is provided
free to individuals by:
Unbound Medicine.