• Photonics Research
  • Vol. 5, Issue 6, B34 (2017)
Simon J. Herr1, Karsten Buse1、2, and Ingo Breunig1、2、*
Author Affiliations
  • 1Laboratory for Optical Systems, Department of Microsystems Engineering, University of Freiburg, Georges-K?hler-Allee 102, 79110 Freiburg, Germany
  • 2Fraunhofer Institute for Physical Measurement Techniques IPM, Heidenhofstra?e 8, 79110 Freiburg, Germany
  • show less
    DOI: 10.1364/PRJ.5.000B34 Cite this Article Set citation alerts
    Simon J. Herr, Karsten Buse, Ingo Breunig. LED-pumped whispering-gallery laser[J]. Photonics Research, 2017, 5(6): B34 Copy Citation Text show less

    Abstract

    A low-cost light-emitting diode (LED) is sufficient to pump a quasi-continuous-wave bidirectional high-Q whispering-gallery resonator laser made of Nd:YVO4. This is remarkable because of the very limited spatial and spectral coherence of an LED. The LED, delivering up to 3.5 W, centered around 810 nm, is turned on in intervals of 100 μs duration, and for these periods a laser output exceeding 0.8 mW has been verified. Furthermore, 0.1-s-long laser pulses are demonstrated. To the best of our knowledge, this is the first demonstration of an LED-pumped high-Q whispering-gallery laser. The concept can be extended easily to other laser active materials. A prospect is also to pump several of such lasers with a single LED.
    Pth2πhchmwmλpησemτFlorPth2πnlhcVpλlλpQlησemτ.(1)

    View in Article

    αeff=0.7  μm0.9  μmαo(λ)+αe(λ)2SLED(λ)dλ(2)

    View in Article

    0.7  μm0.9  μmSLED(λ)dλ=1.(3)

    View in Article

    Pth2π2nlhcALEDλlλpQlσemταeff,(4)

    View in Article

    FOM=λlλpQlσemταeffnl.(5)

    View in Article

    Simon J. Herr, Karsten Buse, Ingo Breunig. LED-pumped whispering-gallery laser[J]. Photonics Research, 2017, 5(6): B34
    Download Citation