Tunable spectral squeezers based on monolithically integrated diamond Raman resonators

E. Granados; G. Stoikos; D. T. Echarri; K. Chrysalidis; V. N. Fedosseev; C. Granados; V. Leask; B. A. Marsh; R. P. Mildren

doi:10.1063/5.0088592

Tunable spectral squeezers based on monolithically integrated diamond Raman resonators

E. Granados^*, G. Stoikos, D. T. Echarri, K. Chrysalidis, V. N. Fedosseev, C. Granados, V. Leask, B. A. Marsh, R. P. Mildren

^*Corresponding author for this work

MQ Photonics Research Centre

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Abstract

We report on the generation and tuning of single-frequency laser light in a monolithic Fabry-Pérot diamond Raman resonator operating in the visible spectral range. The device was capable of squeezing the linewidth of a broad multi-mode nanosecond pump laser (Δνp = 7.2 ± 0.9 GHz at λp = 450 nm) to a nearly Fourier-limited single axial mode Stokes pulse (Δνs = 114 ± 20 MHz at λs = 479 nm). The tuning was achieved by precise adjustment of the resonator temperature, with a measured frequency-temperature tuning slope of ∂ν0 / ∂T ≈ -3 GHz/K, and a temperature dependence of the first-order Raman phonon line of ∂ν_R / ∂T ≈ +0.23 GHz/K. The Stokes center frequency was tuned continuously for over 20 GHz (more than twice the free spectral range of the resonator), which, in combination with the broad Ti:Sapphire laser spectral tunability, enables the production of Fourier-limited pulses in the 400-500 nm spectral range. The Stokes center-frequency fluctuations were 52 MHz (RMS) when the temperature of the resonator was actively stabilized. Moreover, the conversion efficiency was up to 30%, yielding an overall power spectral density enhancement of >25× from pump to Stokes pulse.

Original language	English
Article number	151101
Pages (from-to)	151101-1-151101-6
Number of pages	6
Journal	Applied Physics Letters
Volume	120
Issue number	15
DOIs	https://doi.org/10.1063/5.0088592
Publication status	Published - 11 Apr 2022

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Copyright © 2022 Author(s). Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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title = "Tunable spectral squeezers based on monolithically integrated diamond Raman resonators",

abstract = "We report on the generation and tuning of single-frequency laser light in a monolithic Fabry-P{\'e}rot diamond Raman resonator operating in the visible spectral range. The device was capable of squeezing the linewidth of a broad multi-mode nanosecond pump laser (Δνp = 7.2 ± 0.9 GHz at λp = 450 nm) to a nearly Fourier-limited single axial mode Stokes pulse (Δνs = 114 ± 20 MHz at λs = 479 nm). The tuning was achieved by precise adjustment of the resonator temperature, with a measured frequency-temperature tuning slope of ∂ν0 / ∂T ≈ -3 GHz/K, and a temperature dependence of the first-order Raman phonon line of ∂νR / ∂T ≈ +0.23 GHz/K. The Stokes center frequency was tuned continuously for over 20 GHz (more than twice the free spectral range of the resonator), which, in combination with the broad Ti:Sapphire laser spectral tunability, enables the production of Fourier-limited pulses in the 400-500 nm spectral range. The Stokes center-frequency fluctuations were 52 MHz (RMS) when the temperature of the resonator was actively stabilized. Moreover, the conversion efficiency was up to 30%, yielding an overall power spectral density enhancement of >25× from pump to Stokes pulse. ",

author = "E. Granados and G. Stoikos and Echarri, {D. T.} and K. Chrysalidis and Fedosseev, {V. N.} and C. Granados and V. Leask and Marsh, {B. A.} and Mildren, {R. P.}",

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AU - Granados, E.

AU - Stoikos, G.

AU - Echarri, D. T.

AU - Chrysalidis, K.

AU - Fedosseev, V. N.

AU - Granados, C.

AU - Leask, V.

AU - Marsh, B. A.

AU - Mildren, R. P.

N1 - Copyright © 2022 Author(s). Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2022/4/11

Y1 - 2022/4/11

N2 - We report on the generation and tuning of single-frequency laser light in a monolithic Fabry-Pérot diamond Raman resonator operating in the visible spectral range. The device was capable of squeezing the linewidth of a broad multi-mode nanosecond pump laser (Δνp = 7.2 ± 0.9 GHz at λp = 450 nm) to a nearly Fourier-limited single axial mode Stokes pulse (Δνs = 114 ± 20 MHz at λs = 479 nm). The tuning was achieved by precise adjustment of the resonator temperature, with a measured frequency-temperature tuning slope of ∂ν0 / ∂T ≈ -3 GHz/K, and a temperature dependence of the first-order Raman phonon line of ∂νR / ∂T ≈ +0.23 GHz/K. The Stokes center frequency was tuned continuously for over 20 GHz (more than twice the free spectral range of the resonator), which, in combination with the broad Ti:Sapphire laser spectral tunability, enables the production of Fourier-limited pulses in the 400-500 nm spectral range. The Stokes center-frequency fluctuations were 52 MHz (RMS) when the temperature of the resonator was actively stabilized. Moreover, the conversion efficiency was up to 30%, yielding an overall power spectral density enhancement of >25× from pump to Stokes pulse.

AB - We report on the generation and tuning of single-frequency laser light in a monolithic Fabry-Pérot diamond Raman resonator operating in the visible spectral range. The device was capable of squeezing the linewidth of a broad multi-mode nanosecond pump laser (Δνp = 7.2 ± 0.9 GHz at λp = 450 nm) to a nearly Fourier-limited single axial mode Stokes pulse (Δνs = 114 ± 20 MHz at λs = 479 nm). The tuning was achieved by precise adjustment of the resonator temperature, with a measured frequency-temperature tuning slope of ∂ν0 / ∂T ≈ -3 GHz/K, and a temperature dependence of the first-order Raman phonon line of ∂νR / ∂T ≈ +0.23 GHz/K. The Stokes center frequency was tuned continuously for over 20 GHz (more than twice the free spectral range of the resonator), which, in combination with the broad Ti:Sapphire laser spectral tunability, enables the production of Fourier-limited pulses in the 400-500 nm spectral range. The Stokes center-frequency fluctuations were 52 MHz (RMS) when the temperature of the resonator was actively stabilized. Moreover, the conversion efficiency was up to 30%, yielding an overall power spectral density enhancement of >25× from pump to Stokes pulse.

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Tunable spectral squeezers based on monolithically integrated diamond Raman resonators

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