Whispering-gallery-mode-resonator-stabilized narrow-linewidth fiber loop laser

Sprenger, Benjamin; Schwefel, Harald G. L.; Wang, L. J.

doi:10.1364/ol.34.003370

Cited by 82 publications

(39 citation statements)

References 18 publications

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“…The high-Q wavelength selectivity of the microsphere enabled linewidth narrowing of the diode laser output from 35 MHz to under 100 kHz [69]. Microsphere stabilization of an erbium-doped fiber loop has also been effective, here the backreflected light from a microsphere was coupled to a doped fiber via a tapered optical fiber and light was collected from the sphere using a polished fiber tip [70]. Using the microsphere as a frequency-selective feedback element in this way allowed single-mode lasing over many hours with less than 100 MHz drift.…”

Section: Figurementioning

confidence: 99%

WGM microresonators: sensing, lasing and fundamental optics with microspheres

Ward

Benson

2011

Laser & Photonics Reviews

293

197

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Glass microsphere resonators that support optical resonances known as whispering-gallery modes are unique tools for studying and exploiting optical effects under extremely well controlled conditions. In this paper, a review focusing mostly on glass microsphere resonators is presented. First, a brief historical background is given in which is shown how the stateof-the-art has grown from novel optical resonators to the ultrahigh Q cavities used in cutting-edge experiments. After the basic properties of microsphere resonators are outlined some of the recent experiments involving microsphere resonators are discussed, although some discussion involving polymeric microspheres is also included. The use of doped and undoped microspheres in optical signal processing, optical sensing and quantum optics is highlighted. Finally, there is a brief review of recent optomechanical experiments that use microspheres.

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Section: Figurementioning

confidence: 99%

WGM microresonators: sensing, lasing and fundamental optics with microspheres

Ward

Benson

2011

Laser & Photonics Reviews

293

197

View full text Add to dashboard Cite

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“…Prism coupling allows for a more rigid construction, which is less sensitive to mechanical vibrations of the environment. In comparison, previous approaches utilized tapered and angle polished fibers for the resonator coupling [22]. For the coupling into and out of the fiber loop a pair of gradient index (GRIN) lenses is used, where the numerical aperture and the focal point are adjustable.…”

Section: Methodsmentioning

confidence: 99%

Sub-kHz lasing of a CaF_2 whispering gallery mode resonator stabilized fiber ring laser

Collodo¹,

Sedlmeir²,

Sprenger³

et al. 2014

Opt. Express

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We utilize a high quality calcium fluoride whispering-gallerymode resonator to passively stabilize a simple erbium doped fiber ring laser with an emission frequency of 196 THz (wavelength 1530 nm) to an instantaneous linewidth below 650 Hz. This corresponds to a relative stability of 3.3 × 10 −12 over 16 µs. In order to characterize the linewidth we use two identical self-built lasers and a commercial laser to determine the individual lasing linewidth via the three-cornered-hat method. We further show that the lasers are finely tunable throughout the erbium gain region.

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“…11 For practical sensing applications pump power in the EDFA should be kept fixed in order to avoid thermal drift as reported in Ref. [10]. Gain chips (based for instance on semiconductor optical amplifiers) can be used instead of the EDFA if different wavelengths are needed.…”

Section: System Characterization Comparing Laser Line and Resonance Smentioning

confidence: 99%

Whispering gallery mode microresonators: results on aptasensors and on a new sensing approach

et al. 2013

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We present results on the implementation of Whispering Gallery Modes (WGM) biosensors and on the demonstration of a new detection method for WGM based sensors. We first present a functionalization procedure based on the DNAaptamer sequence immobilization on WGM resonators, able to recognize specifically thrombin protein. The protein binding was optically characterized in terms of specificity in buffer solution and in 10% diluted human serum. When performing the above measurements, we have used the typical detection scheme for WGM resonator based sensors, which relies on tracking the resonance shift − by scanning with a tunable laser − when a change of the refractive index in the region probed by the WGM takes place. In the second part of the presentation we propose a new sensing approach based instead on monitoring the position of the laser line of a fiber ring laser having a WGM microsphere in its loop. We demonstrate that the induced shift is the same for the ring laser line and for the microsphere resonance. The proposed method requires simpler and cheaper equipment and may also improve the sensor resolution because the ring laser line is narrower than the microsphere WGM resonance.

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Whispering-gallery-mode-resonator-stabilized narrow-linewidth fiber loop laser

Cited by 82 publications

References 18 publications

WGM microresonators: sensing, lasing and fundamental optics with microspheres

WGM microresonators: sensing, lasing and fundamental optics with microspheres

Sub-kHz lasing of a CaF_2 whispering gallery mode resonator stabilized fiber ring laser

Whispering gallery mode microresonators: results on aptasensors and on a new sensing approach

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