Resonance amplifier model describing diode lasers coupled to short external resonators

Voumard, C.; Salathé, R. P.; Weber, H. P.

doi:10.1007/bf00886039

Cited by 41 publications

(8 citation statements)

References 15 publications

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“…where R e = |r e | 2 relates the power reflectivity to the complex field reflectivity r e . We use the model for the effective reflectivity by Voumard et al [33], detailed further in the Supplemental Material [34]. Neglecting phase components, at threshold, R 1 R e e ( g−α t )2L = 1, where g = g th is the (threshold) gain coefficient.…”

Section: A External Cavity Laser Modelmentioning

confidence: 99%

Laser threshold magnetometry using green-light absorption by diamond nitrogen vacancies in an external cavity laser

et al. 2021

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Nitrogen vacancy (NV) centers in diamond have attracted considerable recent interest for use in quantum sensing, promising increased sensitivity for applications ranging from geophysics to biomedicine. Conventional sensing schemes involve monitoring the change in red fluorescence from the NV center under green laser and microwave illumination. Due to the strong fluorescence background from emission in the NV triplet state and low relative contrast of any change in output, sensitivity is severely restricted by a high optical shot noise level. Here, we propose a means to avoid this issue, by using the change in green pump absorption through the diamond as part of a semiconductor external cavity laser run close to the lasing threshold. We show that theoretical sensitivity to the magnetic field on the pT/ √ Hz level is possible using a diamond with an optimal density of NV centers. We discuss the physical requirements and limitations of the method, particularly the role of amplified spontaneous emission near threshold and explore realistic implementations using current technology.

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Section: A External Cavity Laser Modelmentioning

confidence: 99%

Laser threshold magnetometry using green-light absorption by diamond nitrogen vacancies in an external cavity laser

et al. 2021

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“…where R e = |r e | 2 relates the power reflectivity to the complex field reflectivity, r e . We use the model for the effective reflectivity by Voumard et al [32], detailed further in the Supplementary Information. Neglecting phase components, at threshold R 1 R e e (Γg−αt)2L = 1, where g = g th is the (threshold) gain coefficient.…”

Section: A External Cavity Laser Modelmentioning

confidence: 99%

Laser threshold magnetometry using green light absorption by diamond nitrogen vacancies in an external cavity laser

Webb,

Poulsen,

Staacke

et al. 2021

Preprint

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Nitrogen vacancy (NV) centers in diamond have attracted considerable recent interest for use in quantum sensing, promising increased sensitivity for applications ranging from geophysics to biomedicine. Conventional sensing schemes involve monitoring the change in red fluorescence from the NV center under green laser and microwave illumination. Due to the strong fluorescence background from emission in the NV triplet state and low relative contrast of any change in output, sensitivity is severely restricted by a high optical shot noise level. Here, we propose a means to avoid this issue, by using the change in green pump absorption through the diamond as part of a semiconductor external cavity laser run close to lasing threshold. We show theoretical sensitivity to magnetic field on the pT/ √ Hz level is possible using a diamond with an optimal density of NV centers. We discuss the physical requirements and limitations of the method, particularly the role of amplified spontaneous emission near threshold and explore realistic implementations using current technology.

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“…The solution of (14) indicates that the population inversion increases with current density until threshold is reached. At that point, N approaches its asymptotic value N t h = y/o.…”

Section: Laser Output Characteristicsmentioning

confidence: 99%

An external cavity diode laser sensor

Miles

Dandridge

Tveten

et al. 1983

J. Lightwave Technol.

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Abstract-A simple compact optical sensor system consisting of a near-field external cavity coupled to a semiconductor laser is reported. In this device, a change of phase in the light fed back into the laser cavity by the perturbed external mirror modulates the output of the laser by effectively changing the laser facet reflectivity. Phase shifts of 9 .rad and rad were measured at 10 kHz and 100 Hz, respectively, using a 1-Hz bandwidth and a 98-percent reflector placed less than 10 pm from the laser facet. The sensitivity of these devices is shown to be limited by the intrinsic amplitude noise of the laser. The implementation of this sensor configuration is reported as an acoustic sensor, hydrophone, magnetic field, and current sensor as well as an accelerometer.

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Resonance amplifier model describing diode lasers coupled to short external resonators

Cited by 41 publications

References 15 publications

Laser threshold magnetometry using green-light absorption by diamond nitrogen vacancies in an external cavity laser

Laser threshold magnetometry using green-light absorption by diamond nitrogen vacancies in an external cavity laser

Laser threshold magnetometry using green light absorption by diamond nitrogen vacancies in an external cavity laser

An external cavity diode laser sensor

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