Linear Laser Tuning Using a Pressure-Sensitive Microbubble Resonator

Ramgopal Madugani; Yong Yang; Vu H. Le; Jonathan M. Ward; Síle Nic Chormaic

doi:10.1109/LPT.2016.2532341

Linear Laser Tuning Using a Pressure-Sensitive Microbubble Resonator

Ramgopal Madugani
, Yong Yang
, Vu H. Le
, Jonathan M. Ward
, Síle Nic Chormaic

Research output: Contribution to journal › Article › peer-review

Abstract

The tunability of an optical cavity is an essential requirement for many areas of research. Here, we use the Pound-Drever-Hall technique to lock a laser to a whispering gallery mode (WGM) of a microbubble resonator, to show that linear tuning of the WGM, and the corresponding locked laser, display almost zero hysteresis. By applying aerostatic pressure to the interior surface of the microbubble resonator, optical mode shift rates of around 58 GHz/MPa are achieved. The microbubble can measure pressure with a detection limit of 2 × 10^-4 MPa, which is an improvement made on pressure sensing using this device. The long-term frequency stability of this tuning method for different input pressures is measured. The frequency noise of the WGM measured over 10 min for an input pressure of 0.5 MPa has a maximum standard deviation of 36 MHz.

Original language	English
Article number	7414429
Pages (from-to)	1134-1137
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	28
Issue number	10
DOIs	https://doi.org/10.1109/LPT.2016.2532341
Publication status	Published - 15 May 2016
Externally published	Yes

Keywords

Microcavities
Microcavity devices
Pressure measurement
Tunable lasers.

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10.1109/LPT.2016.2532341

Cite this

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title = "Linear Laser Tuning Using a Pressure-Sensitive Microbubble Resonator",

abstract = "The tunability of an optical cavity is an essential requirement for many areas of research. Here, we use the Pound-Drever-Hall technique to lock a laser to a whispering gallery mode (WGM) of a microbubble resonator, to show that linear tuning of the WGM, and the corresponding locked laser, display almost zero hysteresis. By applying aerostatic pressure to the interior surface of the microbubble resonator, optical mode shift rates of around 58 GHz/MPa are achieved. The microbubble can measure pressure with a detection limit of 2 × 10-4 MPa, which is an improvement made on pressure sensing using this device. The long-term frequency stability of this tuning method for different input pressures is measured. The frequency noise of the WGM measured over 10 min for an input pressure of 0.5 MPa has a maximum standard deviation of 36 MHz.",

keywords = "Microcavities, Microcavity devices, Pressure measurement, Tunable lasers.",

author = "Ramgopal Madugani and Yong Yang and Le, \{Vu H.\} and Ward, \{Jonathan M.\} and \{Nic Chormaic\}, S{\'i}le",

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doi = "10.1109/LPT.2016.2532341",

language = "English",

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AU - Madugani, Ramgopal

AU - Yang, Yong

AU - Le, Vu H.

AU - Ward, Jonathan M.

AU - Nic Chormaic, Síle

PY - 2016/5/15

Y1 - 2016/5/15

N2 - The tunability of an optical cavity is an essential requirement for many areas of research. Here, we use the Pound-Drever-Hall technique to lock a laser to a whispering gallery mode (WGM) of a microbubble resonator, to show that linear tuning of the WGM, and the corresponding locked laser, display almost zero hysteresis. By applying aerostatic pressure to the interior surface of the microbubble resonator, optical mode shift rates of around 58 GHz/MPa are achieved. The microbubble can measure pressure with a detection limit of 2 × 10-4 MPa, which is an improvement made on pressure sensing using this device. The long-term frequency stability of this tuning method for different input pressures is measured. The frequency noise of the WGM measured over 10 min for an input pressure of 0.5 MPa has a maximum standard deviation of 36 MHz.

AB - The tunability of an optical cavity is an essential requirement for many areas of research. Here, we use the Pound-Drever-Hall technique to lock a laser to a whispering gallery mode (WGM) of a microbubble resonator, to show that linear tuning of the WGM, and the corresponding locked laser, display almost zero hysteresis. By applying aerostatic pressure to the interior surface of the microbubble resonator, optical mode shift rates of around 58 GHz/MPa are achieved. The microbubble can measure pressure with a detection limit of 2 × 10-4 MPa, which is an improvement made on pressure sensing using this device. The long-term frequency stability of this tuning method for different input pressures is measured. The frequency noise of the WGM measured over 10 min for an input pressure of 0.5 MPa has a maximum standard deviation of 36 MHz.

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Linear Laser Tuning Using a Pressure-Sensitive Microbubble Resonator

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Keywords

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