Abstract

By splicing on a length of Ho3+-doped silica fiber onto a diode-pumped double-clad Tm3+-doped silica fiber, stable passive Q switching of the Tm3+-doped silica fiber laser is demonstrated. The formation of Q-switched pulses was found to depend on both the length and the position of the Ho3+-doped silica fiber that was inserted into the fiber laser cavity. For stable Q-switched pulse generation, Ho3+-doped silica fiber lengths shorter than twice the absorption depth must be used. For long Ho3+-doped silica fiber lengths, randomly generated pulses are observed at operating wavelengths longer than 2090  nm, which are attributed to intracavity pumping of the Ho3+-doped silica fiber.

© 2007 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. S. D. Jackson, A. Sabella, and D. G. Lancaster, "Application and development of high power and highly efficient silica-based fibre lasers operating at 2 μm," IEEE J. Sel. Top. Quantum Electron. (in press 2007).
  2. P. Myslinski, X. Pan, C. Barnard, J. Chrostowski, B. T. Siullivan, and J. F. Bayon, "Q-switched thulium-doped fiber laser," Opt. Eng. 32, 2025-2030 (1993).
    [CrossRef]
  3. A. F. El-Sherif and T. A. King, "High-peak-power operation of a Q-switched Tm3+-doped silica fiber laser operating near 2 μm," Opt. Lett. 28, 22-24 (2003).
    [CrossRef] [PubMed]
  4. N. P. Barnes, W. A. Clarkson, D. C. Hanna, P. W. Turner, J. Nilsson, and B. M. Walsh, "Diode pumped, tunable Q-switched Tm-glass fiber laser," in Advanced Solid State Lasers, Vol. 50 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2001), pp. 88-95.
  5. F. Z. Qamar and T. A. King, "Passive Q-switching of the Tm-silica fibre laser near 2 μm by a Cr2+:ZnSe saturable absorber crystal," Opt. Commun. 248, 501-508 (2005).
    [CrossRef]
  6. L. E. Nelson, E. Ippen, and H. A. Haus, "Broadly tunable sub-500 fs pulses from an additive pulse mode-locked thulium doped fiber ring laser," Appl. Phys. Lett. 67, 19-21 (1995).
    [CrossRef]
  7. R. C. Sharp, D. E. Spock, N. Pan, and J. Elliot, "190-fs passively mode-locked thulium fiber laser with a low threshold," Opt. Lett. 21, 881-883 (1996).
    [CrossRef] [PubMed]
  8. B. M. Walsh and N. P. Barnes, "Comparison of Tm:ZBLAN and Tm:silica fiber lasers; spectroscopy and tunable pulsed laser operation around 1.9 μm," Appl. Phys. B 78, 325-333 (2004).
    [CrossRef]
  9. L. G. Luo and P. L. Chu, "Passive Q-switched erbium-doped fibre laser with saturable absorber," Opt. Commun. 161, 257-263 (1999).
    [CrossRef]
  10. L. Tordella, H. Djellout, B. Dussardier, A. Saissy, and G. Monnom, "High repetition rate passively Q-switched Nd3+:Cr4+ all-fibre laser," Electron. Lett. 39, 1307-1308 (2003).
    [CrossRef]
  11. V. V. Dvoyrin, V. M. Mashinsky, and E. M. Dianov, "Yb-Bi pulsed fiber lasers," Opt. Lett. 32, 451-453 (2007).
    [CrossRef] [PubMed]
  12. Y. K. Kuo, M. Birnbaum, and W. Chen, "Ho-YLiF4 saturable absorber Q-switch for the 2 μm Tm,Cr-Y3Al15O12 laser," Appl. Phys. Lett. 65, 3060-3062 (1994).
    [CrossRef]
  13. Y. K. Kuo and M. Birnbaum, "Ho:YVO4 solid-state saturable-absorber Q switch for a 2-μm Tm,Cr:Y3Al5O12 laser," Appl. Opt. 35, 881-884 (1996).
    [CrossRef] [PubMed]
  14. Y. K. Kuo, M. Birnbaum, F. Unlu, and M. F. Huang, "Ho:CaF2 solid-state saturable-absorber Q switch for the 2-μm Tm,Cr:Y3Al5O12 laser," Appl. Opt. 35, 2576-2579 (1996).
    [CrossRef] [PubMed]
  15. S. D. Jackson, J. D. Love, and C. Durniak, "Discrete wavelength generation from a coaxial dual-core fiber laser" (submitted to Optics Letters).
  16. S. D. Jackson, "Midinfrared holmium fiber lasers," IEEE J. Quantum Electron. 42, 187-191 (2006).
    [CrossRef]
  17. W. A. Clarkson, N. P. Barnes, P. W. Turner, J. Nilsson, and D. C. Hanna, "High-power cladding-pumped Tm-doped silica fiber laser with wavelength tuning from 1860 to 2090 nm," Opt. Lett. 27, 1989-1991 (2002).
    [CrossRef]
  18. S. D. Jackson, A. Sabella, A. Hemming, S. Bennetts, and D. G. Lancaster, "High power 83 W holmium-doped silica fiber laser operating with high beam quality," Opt. Lett. 32, 241-243 (2007).
    [CrossRef] [PubMed]
  19. R. C. Stoneman and L Esterowitz, "Intracavity-pumped 2.09 μm Ho-YAG laser," Opt. Lett. 17, 736-738 (1992).
    [CrossRef] [PubMed]
  20. C. Bollig, R. A. Hayward, W. A. Clarkson, and D. C. Hanna, "2-W Ho:YAG laser intracavity pumped by a diode-pumped Tm:YAG laser," Opt. Lett. 23, 1757-1759 (1998).
    [CrossRef]
  21. M. Schellhorn, A. Hirth, and C. Kieleck, "Ho:YAG laser intracavity pumped by a diode-pumped Tm:YLF laser," Opt. Lett. 28, 1933-1935 (2003).
    [CrossRef] [PubMed]

2007

2006

S. D. Jackson, "Midinfrared holmium fiber lasers," IEEE J. Quantum Electron. 42, 187-191 (2006).
[CrossRef]

2005

F. Z. Qamar and T. A. King, "Passive Q-switching of the Tm-silica fibre laser near 2 μm by a Cr2+:ZnSe saturable absorber crystal," Opt. Commun. 248, 501-508 (2005).
[CrossRef]

2004

B. M. Walsh and N. P. Barnes, "Comparison of Tm:ZBLAN and Tm:silica fiber lasers; spectroscopy and tunable pulsed laser operation around 1.9 μm," Appl. Phys. B 78, 325-333 (2004).
[CrossRef]

2003

2002

1999

L. G. Luo and P. L. Chu, "Passive Q-switched erbium-doped fibre laser with saturable absorber," Opt. Commun. 161, 257-263 (1999).
[CrossRef]

1998

1996

1995

L. E. Nelson, E. Ippen, and H. A. Haus, "Broadly tunable sub-500 fs pulses from an additive pulse mode-locked thulium doped fiber ring laser," Appl. Phys. Lett. 67, 19-21 (1995).
[CrossRef]

1994

Y. K. Kuo, M. Birnbaum, and W. Chen, "Ho-YLiF4 saturable absorber Q-switch for the 2 μm Tm,Cr-Y3Al15O12 laser," Appl. Phys. Lett. 65, 3060-3062 (1994).
[CrossRef]

1993

P. Myslinski, X. Pan, C. Barnard, J. Chrostowski, B. T. Siullivan, and J. F. Bayon, "Q-switched thulium-doped fiber laser," Opt. Eng. 32, 2025-2030 (1993).
[CrossRef]

1992

Barnard, C.

P. Myslinski, X. Pan, C. Barnard, J. Chrostowski, B. T. Siullivan, and J. F. Bayon, "Q-switched thulium-doped fiber laser," Opt. Eng. 32, 2025-2030 (1993).
[CrossRef]

Barnes, N. P.

B. M. Walsh and N. P. Barnes, "Comparison of Tm:ZBLAN and Tm:silica fiber lasers; spectroscopy and tunable pulsed laser operation around 1.9 μm," Appl. Phys. B 78, 325-333 (2004).
[CrossRef]

W. A. Clarkson, N. P. Barnes, P. W. Turner, J. Nilsson, and D. C. Hanna, "High-power cladding-pumped Tm-doped silica fiber laser with wavelength tuning from 1860 to 2090 nm," Opt. Lett. 27, 1989-1991 (2002).
[CrossRef]

N. P. Barnes, W. A. Clarkson, D. C. Hanna, P. W. Turner, J. Nilsson, and B. M. Walsh, "Diode pumped, tunable Q-switched Tm-glass fiber laser," in Advanced Solid State Lasers, Vol. 50 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2001), pp. 88-95.

Bayon, J. F.

P. Myslinski, X. Pan, C. Barnard, J. Chrostowski, B. T. Siullivan, and J. F. Bayon, "Q-switched thulium-doped fiber laser," Opt. Eng. 32, 2025-2030 (1993).
[CrossRef]

Bennetts, S.

Birnbaum, M.

Bollig, C.

Chen, W.

Y. K. Kuo, M. Birnbaum, and W. Chen, "Ho-YLiF4 saturable absorber Q-switch for the 2 μm Tm,Cr-Y3Al15O12 laser," Appl. Phys. Lett. 65, 3060-3062 (1994).
[CrossRef]

Chrostowski, J.

P. Myslinski, X. Pan, C. Barnard, J. Chrostowski, B. T. Siullivan, and J. F. Bayon, "Q-switched thulium-doped fiber laser," Opt. Eng. 32, 2025-2030 (1993).
[CrossRef]

Chu, P. L.

L. G. Luo and P. L. Chu, "Passive Q-switched erbium-doped fibre laser with saturable absorber," Opt. Commun. 161, 257-263 (1999).
[CrossRef]

Clarkson, W. A.

W. A. Clarkson, N. P. Barnes, P. W. Turner, J. Nilsson, and D. C. Hanna, "High-power cladding-pumped Tm-doped silica fiber laser with wavelength tuning from 1860 to 2090 nm," Opt. Lett. 27, 1989-1991 (2002).
[CrossRef]

C. Bollig, R. A. Hayward, W. A. Clarkson, and D. C. Hanna, "2-W Ho:YAG laser intracavity pumped by a diode-pumped Tm:YAG laser," Opt. Lett. 23, 1757-1759 (1998).
[CrossRef]

N. P. Barnes, W. A. Clarkson, D. C. Hanna, P. W. Turner, J. Nilsson, and B. M. Walsh, "Diode pumped, tunable Q-switched Tm-glass fiber laser," in Advanced Solid State Lasers, Vol. 50 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2001), pp. 88-95.

Dianov, E. M.

Djellout, H.

L. Tordella, H. Djellout, B. Dussardier, A. Saissy, and G. Monnom, "High repetition rate passively Q-switched Nd3+:Cr4+ all-fibre laser," Electron. Lett. 39, 1307-1308 (2003).
[CrossRef]

Durniak, C.

S. D. Jackson, J. D. Love, and C. Durniak, "Discrete wavelength generation from a coaxial dual-core fiber laser" (submitted to Optics Letters).

Dussardier, B.

L. Tordella, H. Djellout, B. Dussardier, A. Saissy, and G. Monnom, "High repetition rate passively Q-switched Nd3+:Cr4+ all-fibre laser," Electron. Lett. 39, 1307-1308 (2003).
[CrossRef]

Dvoyrin, V. V.

Elliot, J.

El-Sherif, A. F.

Esterowitz, L

Hanna, D. C.

W. A. Clarkson, N. P. Barnes, P. W. Turner, J. Nilsson, and D. C. Hanna, "High-power cladding-pumped Tm-doped silica fiber laser with wavelength tuning from 1860 to 2090 nm," Opt. Lett. 27, 1989-1991 (2002).
[CrossRef]

C. Bollig, R. A. Hayward, W. A. Clarkson, and D. C. Hanna, "2-W Ho:YAG laser intracavity pumped by a diode-pumped Tm:YAG laser," Opt. Lett. 23, 1757-1759 (1998).
[CrossRef]

N. P. Barnes, W. A. Clarkson, D. C. Hanna, P. W. Turner, J. Nilsson, and B. M. Walsh, "Diode pumped, tunable Q-switched Tm-glass fiber laser," in Advanced Solid State Lasers, Vol. 50 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2001), pp. 88-95.

Haus, H. A.

L. E. Nelson, E. Ippen, and H. A. Haus, "Broadly tunable sub-500 fs pulses from an additive pulse mode-locked thulium doped fiber ring laser," Appl. Phys. Lett. 67, 19-21 (1995).
[CrossRef]

Hayward, R. A.

Hemming, A.

Hirth, A.

Huang, M. F.

Ippen, E.

L. E. Nelson, E. Ippen, and H. A. Haus, "Broadly tunable sub-500 fs pulses from an additive pulse mode-locked thulium doped fiber ring laser," Appl. Phys. Lett. 67, 19-21 (1995).
[CrossRef]

Jackson, S. D.

S. D. Jackson, A. Sabella, A. Hemming, S. Bennetts, and D. G. Lancaster, "High power 83 W holmium-doped silica fiber laser operating with high beam quality," Opt. Lett. 32, 241-243 (2007).
[CrossRef] [PubMed]

S. D. Jackson, "Midinfrared holmium fiber lasers," IEEE J. Quantum Electron. 42, 187-191 (2006).
[CrossRef]

S. D. Jackson, J. D. Love, and C. Durniak, "Discrete wavelength generation from a coaxial dual-core fiber laser" (submitted to Optics Letters).

S. D. Jackson, A. Sabella, and D. G. Lancaster, "Application and development of high power and highly efficient silica-based fibre lasers operating at 2 μm," IEEE J. Sel. Top. Quantum Electron. (in press 2007).

Kieleck, C.

King, T. A.

F. Z. Qamar and T. A. King, "Passive Q-switching of the Tm-silica fibre laser near 2 μm by a Cr2+:ZnSe saturable absorber crystal," Opt. Commun. 248, 501-508 (2005).
[CrossRef]

A. F. El-Sherif and T. A. King, "High-peak-power operation of a Q-switched Tm3+-doped silica fiber laser operating near 2 μm," Opt. Lett. 28, 22-24 (2003).
[CrossRef] [PubMed]

Kuo, Y. K.

Lancaster, D. G.

S. D. Jackson, A. Sabella, A. Hemming, S. Bennetts, and D. G. Lancaster, "High power 83 W holmium-doped silica fiber laser operating with high beam quality," Opt. Lett. 32, 241-243 (2007).
[CrossRef] [PubMed]

S. D. Jackson, A. Sabella, and D. G. Lancaster, "Application and development of high power and highly efficient silica-based fibre lasers operating at 2 μm," IEEE J. Sel. Top. Quantum Electron. (in press 2007).

Love, J. D.

S. D. Jackson, J. D. Love, and C. Durniak, "Discrete wavelength generation from a coaxial dual-core fiber laser" (submitted to Optics Letters).

Luo, L. G.

L. G. Luo and P. L. Chu, "Passive Q-switched erbium-doped fibre laser with saturable absorber," Opt. Commun. 161, 257-263 (1999).
[CrossRef]

Mashinsky, V. M.

Monnom, G.

L. Tordella, H. Djellout, B. Dussardier, A. Saissy, and G. Monnom, "High repetition rate passively Q-switched Nd3+:Cr4+ all-fibre laser," Electron. Lett. 39, 1307-1308 (2003).
[CrossRef]

Myslinski, P.

P. Myslinski, X. Pan, C. Barnard, J. Chrostowski, B. T. Siullivan, and J. F. Bayon, "Q-switched thulium-doped fiber laser," Opt. Eng. 32, 2025-2030 (1993).
[CrossRef]

Nelson, L. E.

L. E. Nelson, E. Ippen, and H. A. Haus, "Broadly tunable sub-500 fs pulses from an additive pulse mode-locked thulium doped fiber ring laser," Appl. Phys. Lett. 67, 19-21 (1995).
[CrossRef]

Nilsson, J.

W. A. Clarkson, N. P. Barnes, P. W. Turner, J. Nilsson, and D. C. Hanna, "High-power cladding-pumped Tm-doped silica fiber laser with wavelength tuning from 1860 to 2090 nm," Opt. Lett. 27, 1989-1991 (2002).
[CrossRef]

N. P. Barnes, W. A. Clarkson, D. C. Hanna, P. W. Turner, J. Nilsson, and B. M. Walsh, "Diode pumped, tunable Q-switched Tm-glass fiber laser," in Advanced Solid State Lasers, Vol. 50 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2001), pp. 88-95.

Pan, N.

Pan, X.

P. Myslinski, X. Pan, C. Barnard, J. Chrostowski, B. T. Siullivan, and J. F. Bayon, "Q-switched thulium-doped fiber laser," Opt. Eng. 32, 2025-2030 (1993).
[CrossRef]

Qamar, F. Z.

F. Z. Qamar and T. A. King, "Passive Q-switching of the Tm-silica fibre laser near 2 μm by a Cr2+:ZnSe saturable absorber crystal," Opt. Commun. 248, 501-508 (2005).
[CrossRef]

Sabella, A.

S. D. Jackson, A. Sabella, A. Hemming, S. Bennetts, and D. G. Lancaster, "High power 83 W holmium-doped silica fiber laser operating with high beam quality," Opt. Lett. 32, 241-243 (2007).
[CrossRef] [PubMed]

S. D. Jackson, A. Sabella, and D. G. Lancaster, "Application and development of high power and highly efficient silica-based fibre lasers operating at 2 μm," IEEE J. Sel. Top. Quantum Electron. (in press 2007).

Saissy, A.

L. Tordella, H. Djellout, B. Dussardier, A. Saissy, and G. Monnom, "High repetition rate passively Q-switched Nd3+:Cr4+ all-fibre laser," Electron. Lett. 39, 1307-1308 (2003).
[CrossRef]

Schellhorn, M.

Sharp, R. C.

Siullivan, B. T.

P. Myslinski, X. Pan, C. Barnard, J. Chrostowski, B. T. Siullivan, and J. F. Bayon, "Q-switched thulium-doped fiber laser," Opt. Eng. 32, 2025-2030 (1993).
[CrossRef]

Spock, D. E.

Stoneman, R. C.

Tordella, L.

L. Tordella, H. Djellout, B. Dussardier, A. Saissy, and G. Monnom, "High repetition rate passively Q-switched Nd3+:Cr4+ all-fibre laser," Electron. Lett. 39, 1307-1308 (2003).
[CrossRef]

Turner, P. W.

W. A. Clarkson, N. P. Barnes, P. W. Turner, J. Nilsson, and D. C. Hanna, "High-power cladding-pumped Tm-doped silica fiber laser with wavelength tuning from 1860 to 2090 nm," Opt. Lett. 27, 1989-1991 (2002).
[CrossRef]

N. P. Barnes, W. A. Clarkson, D. C. Hanna, P. W. Turner, J. Nilsson, and B. M. Walsh, "Diode pumped, tunable Q-switched Tm-glass fiber laser," in Advanced Solid State Lasers, Vol. 50 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2001), pp. 88-95.

Unlu, F.

Walsh, B. M.

B. M. Walsh and N. P. Barnes, "Comparison of Tm:ZBLAN and Tm:silica fiber lasers; spectroscopy and tunable pulsed laser operation around 1.9 μm," Appl. Phys. B 78, 325-333 (2004).
[CrossRef]

N. P. Barnes, W. A. Clarkson, D. C. Hanna, P. W. Turner, J. Nilsson, and B. M. Walsh, "Diode pumped, tunable Q-switched Tm-glass fiber laser," in Advanced Solid State Lasers, Vol. 50 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2001), pp. 88-95.

Appl. Opt.

Appl. Phys. B

B. M. Walsh and N. P. Barnes, "Comparison of Tm:ZBLAN and Tm:silica fiber lasers; spectroscopy and tunable pulsed laser operation around 1.9 μm," Appl. Phys. B 78, 325-333 (2004).
[CrossRef]

Appl. Phys. Lett.

L. E. Nelson, E. Ippen, and H. A. Haus, "Broadly tunable sub-500 fs pulses from an additive pulse mode-locked thulium doped fiber ring laser," Appl. Phys. Lett. 67, 19-21 (1995).
[CrossRef]

Y. K. Kuo, M. Birnbaum, and W. Chen, "Ho-YLiF4 saturable absorber Q-switch for the 2 μm Tm,Cr-Y3Al15O12 laser," Appl. Phys. Lett. 65, 3060-3062 (1994).
[CrossRef]

Electron. Lett.

L. Tordella, H. Djellout, B. Dussardier, A. Saissy, and G. Monnom, "High repetition rate passively Q-switched Nd3+:Cr4+ all-fibre laser," Electron. Lett. 39, 1307-1308 (2003).
[CrossRef]

IEEE J. Quantum Electron.

S. D. Jackson, "Midinfrared holmium fiber lasers," IEEE J. Quantum Electron. 42, 187-191 (2006).
[CrossRef]

IEEE J. Sel. Top. Quantum Electron.

S. D. Jackson, A. Sabella, and D. G. Lancaster, "Application and development of high power and highly efficient silica-based fibre lasers operating at 2 μm," IEEE J. Sel. Top. Quantum Electron. (in press 2007).

Opt. Commun.

L. G. Luo and P. L. Chu, "Passive Q-switched erbium-doped fibre laser with saturable absorber," Opt. Commun. 161, 257-263 (1999).
[CrossRef]

F. Z. Qamar and T. A. King, "Passive Q-switching of the Tm-silica fibre laser near 2 μm by a Cr2+:ZnSe saturable absorber crystal," Opt. Commun. 248, 501-508 (2005).
[CrossRef]

Opt. Eng.

P. Myslinski, X. Pan, C. Barnard, J. Chrostowski, B. T. Siullivan, and J. F. Bayon, "Q-switched thulium-doped fiber laser," Opt. Eng. 32, 2025-2030 (1993).
[CrossRef]

Opt. Lett.

Other

N. P. Barnes, W. A. Clarkson, D. C. Hanna, P. W. Turner, J. Nilsson, and B. M. Walsh, "Diode pumped, tunable Q-switched Tm-glass fiber laser," in Advanced Solid State Lasers, Vol. 50 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2001), pp. 88-95.

S. D. Jackson, J. D. Love, and C. Durniak, "Discrete wavelength generation from a coaxial dual-core fiber laser" (submitted to Optics Letters).

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (11)

Fig. 1
Fig. 1

Schematic diagram of the experimental setup for (a) the passively Q-switched Tm 3 + -doped silica fiber laser which has the pump light propagating in the forward direction (setup A), (b) the extended cavity that has the pump light propagating in the backward direction (setup B) and (c) the cavity used to extra-cavity pump the Ho 3 + -doped silica fiber laser.

Fig. 2
Fig. 2

Measured output power, P o u t as a function of the launched pump power, P L , from the Tm 3 + -doped silica fiber laser pumped in the forward direction. The inset displays the spectrum of the output measured at full pump power. Spectrometer resolution was 0.3   nm .

Fig. 3
Fig. 3

Measured absorption spectrum in the 1000 nm to 2200   nm range of Ho 3 + -doped aluminosilicate glass. A Cary 5 UV-Vis Spectrophotometer with a resolution of 1   nm was used.

Fig. 4
Fig. 4

Measured output from the Ho 3 + -doped silica fiber laser pumped in the backward direction with the 2.05   μm output from the Tm 3 + -doped silica fiber laser. The length of the Ho 3 + -doped silica fiber was 0.5   m . The inset displays the spectrum of the output measured at full pump power.

Fig. 5
Fig. 5

Measured output from the intracavity-pumped Ho 3 + -doped silica fiber laser in setup A arrangement when L a = 0.88   m displaying (a) the output power, P o u t , measured as a function of the launched diode laser power, P L , and (b) the temporal characteristics with the inset displaying the characteristics for a single pulse.

Fig. 6
Fig. 6

Measured spectrum of the output from the Tm 3+ -doped silica fiber laser in setup A arrangement which has a section of Ho 3 + -doped silica fiber spliced into the cavity displayed as a function of L a . Spectrometer resolution was 0.3   nm .

Fig. 7
Fig. 7

Measured (a) output power, P o u t as a function of the launched diode power, P L for the passively Q-switched Tm 3 + -doped silica fiber laser in setup A arrangement that employed Fresnel reflection only, L a = 0.19   m and (b) the temporal characteristics for the same fiber laser arrangement when P L = 28.6   W .

Fig. 8
Fig. 8

Measured pulse width, t p and repetition rate R of the pulses generated from the Q-switched Tm 3 + -doped silica fiber laser in setup A arrangement plotted as a function of the launched diode laser power, P L . Two Ho 3 + -doped silica fiber lengths, L a are represented.

Fig. 9
Fig. 9

Measured output power, P o u t from the fiber laser in setup B arrangement plotted as a function of the launched diode laser power P L and the Ho 3 + -doped silica fiber length, L a , α s = 0.12   dB . The inset shows the launched diode laser power at threshold as a function of the splice loss, αs and the length of Ho 3 + -doped silica fiber, L a .

Fig. 10
Fig. 10

Measured temporal characteristics of the output from the fiber laser in setup B arrangement as a function of the length of Ho 3 + -doped silica fiber, L a .

Fig. 11
Fig. 11

Measured spectrum of the output from the fiber laser in setup B arrangement as a function of the length of Ho 3 + -doped silica fiber, L a .

Metrics