Coupling quantum dots to optical fiber: Low pump threshold laser in the red with a near top hat beam profile

H. Cheng; A. E. Mironov; J. H. Ni; H. J. Yang; W. W. Chen; Z. Dai; P. D. Dragic; J. Dong; S. J. Park; J. G. Eden

doi:10.1063/1.4913698

Coupling quantum dots to optical fiber: Low pump threshold laser in the red with a near top hat beam profile

H. Cheng, A. E. Mironov, J. H. Ni, H. J. Yang, W. W. Chen, Z. Dai, P. D. Dragic, J. Dong, S. J. Park, J. G. Eden

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Abstract

Direct coupling of the optical field in a ∼244 nm thick, CdSe/ZnS quantum dot film to an optical fiber has yielded lasing in the red (λ ∼ 644 nm) with a threshold pump energy density < 2.6 mJ cm^-2. Comprising 28-31 layers of ∼8 nm diameter quantum dots deposited onto the exterior surface of a 125 μm diameter coreless silica fiber, this free-running oscillator produces 134 nJ in 3.6 ns FWHM pulses which correspond to 37 W of peak power from an estimated gain volume of ∼4.5 × 10^-7 cm³. Lasing was confirmed by narrowing of the output optical radiation in both the spectral and temporal domains, and the laser beam intensity profile approximates a top hat.

Original language	English (US)
Article number	081106
Journal	Applied Physics Letters
Volume	106
Issue number	8
DOIs	https://doi.org/10.1063/1.4913698
State	Published - Feb 23 2015

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4913698

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title = "Coupling quantum dots to optical fiber: Low pump threshold laser in the red with a near top hat beam profile",

abstract = "Direct coupling of the optical field in a ∼244 nm thick, CdSe/ZnS quantum dot film to an optical fiber has yielded lasing in the red (λ ∼ 644 nm) with a threshold pump energy density < 2.6 mJ cm-2. Comprising 28-31 layers of ∼8 nm diameter quantum dots deposited onto the exterior surface of a 125 μm diameter coreless silica fiber, this free-running oscillator produces 134 nJ in 3.6 ns FWHM pulses which correspond to 37 W of peak power from an estimated gain volume of ∼4.5 × 10-7 cm3. Lasing was confirmed by narrowing of the output optical radiation in both the spectral and temporal domains, and the laser beam intensity profile approximates a top hat.",

author = "H. Cheng and Mironov, {A. E.} and Ni, {J. H.} and Yang, {H. J.} and Chen, {W. W.} and Z. Dai and Dragic, {P. D.} and J. Dong and Park, {S. J.} and Eden, {J. G.}",

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year = "2015",

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doi = "10.1063/1.4913698",

language = "English (US)",

volume = "106",

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T1 - Coupling quantum dots to optical fiber

T2 - Low pump threshold laser in the red with a near top hat beam profile

AU - Cheng, H.

AU - Mironov, A. E.

AU - Ni, J. H.

AU - Yang, H. J.

AU - Chen, W. W.

AU - Dai, Z.

AU - Dragic, P. D.

AU - Dong, J.

AU - Park, S. J.

AU - Eden, J. G.

PY - 2015/2/23

Y1 - 2015/2/23

N2 - Direct coupling of the optical field in a ∼244 nm thick, CdSe/ZnS quantum dot film to an optical fiber has yielded lasing in the red (λ ∼ 644 nm) with a threshold pump energy density < 2.6 mJ cm-2. Comprising 28-31 layers of ∼8 nm diameter quantum dots deposited onto the exterior surface of a 125 μm diameter coreless silica fiber, this free-running oscillator produces 134 nJ in 3.6 ns FWHM pulses which correspond to 37 W of peak power from an estimated gain volume of ∼4.5 × 10-7 cm3. Lasing was confirmed by narrowing of the output optical radiation in both the spectral and temporal domains, and the laser beam intensity profile approximates a top hat.

AB - Direct coupling of the optical field in a ∼244 nm thick, CdSe/ZnS quantum dot film to an optical fiber has yielded lasing in the red (λ ∼ 644 nm) with a threshold pump energy density < 2.6 mJ cm-2. Comprising 28-31 layers of ∼8 nm diameter quantum dots deposited onto the exterior surface of a 125 μm diameter coreless silica fiber, this free-running oscillator produces 134 nJ in 3.6 ns FWHM pulses which correspond to 37 W of peak power from an estimated gain volume of ∼4.5 × 10-7 cm3. Lasing was confirmed by narrowing of the output optical radiation in both the spectral and temporal domains, and the laser beam intensity profile approximates a top hat.

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Coupling quantum dots to optical fiber: Low pump threshold laser in the red with a near top hat beam profile

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