Stabilization of microwave signal generated by a dual-polarization DBR fiber laser via optical feedback

Liang, Yong; Jin, Long; Cheng, Lei; Guan, Bai‐Ou

doi:10.1364/oe.22.029356

“…Because of common-mode noise cancellation between the two polarization modes, the beat signal has much lower phase noise than each polarization mode30, leading to a narrow linewidth of tens of Hertz, which corresponds to a detection limit of ~10 −11 birefringence change. The ultrasound sensing resolution depends on the noise floor of the fiber laser, which is lower than −150 dBc/Hz.…”

Section: Resultsmentioning

confidence: 99%

Fiber-Laser-Based Ultrasound Sensor for Photoacoustic Imaging

Liang

¹

,

Jin

²

,

Wang

³

et al. 2017

Sci Rep

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Photoacoustic imaging, especially for intravascular and endoscopic applications, requires ultrasound probes with miniature size and high sensitivity. In this paper, we present a new photoacoustic sensor based on a small-sized fiber laser. Incident ultrasound waves exert pressures on the optical fiber laser and induce harmonic vibrations of the fiber, which is detected by the frequency shift of the beating signal between the two orthogonal polarization modes in the fiber laser. This ultrasound sensor presents a noise-equivalent pressure of 40 Pa over a 50-MHz bandwidth. We demonstrate this new ultrasound sensor on an optical-resolution photoacoustic microscope. The axial and lateral resolutions are 48 μm and 3.3 μm. The field of view is up to 1.57 mm2. The sensor exhibits strong resistance to environmental perturbations, such as temperature changes, due to common-mode cancellation between the two orthogonal modes. The present fiber laser ultrasound sensor offers a new tool for all-optical photoacoustic imaging.

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“…Because of common-mode noise cancellation between the two polarization modes, the beat signal has much lower phase noise than each polarization mode 30 , leading to a narrow linewidth of tens of Hertz, which corresponds to a detection limit of ~10…”

Section: Resultsmentioning

confidence: 99%

Fiber laser based ultrasound sensor for photoacoustic imaging

Liang

¹

,

Wang

²

,

Jin

³

et al. 2017

2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO)

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Photoacoustic imaging, especially for intravascular and endoscopic applications, requires ultrasound probes with miniature size and high sensitivity. In this paper, we present a new photoacoustic sensor based on a small-sized fiber laser. Incident ultrasound waves exert pressures on the optical fiber laser and induce harmonic vibrations of the fiber, which is detected by the frequency shift of the beating signal between the two orthogonal polarization modes in the fiber laser. This ultrasound sensor presents a noise-equivalent pressure of 40 Pa over a 50-MHz bandwidth. We demonstrate this new ultrasound sensor on an optical-resolution photoacoustic microscope. The axial and lateral resolutions are 48 μm and 3.3 μm. The field of view is up to 1.57 mm 2 . The sensor exhibits strong resistance to environmental perturbations, such as temperature changes, due to common-mode cancellation between the two orthogonal modes. The present fiber laser ultrasound sensor offers a new tool for alloptical photoacoustic imaging.Photoacoustic tomography (PAT) is a phenomenally growing imaging technology which offers high-contrast, high-resolution and non-invasive imaging in deep tissue 1,2 . PAT has received great interests due to promising applications in disease diagnoses and life science researches [3][4][5][6][7] . PAT detects optically induced ultrasound signals to form three-dimensional images [8][9][10] . Further development of PAT demands high-performance ultrasound sensors with high sensitivity, small size, broad bandwidth and great stability. Specifically, intravascular and endoscopic photoacoustic imaging requires ultrasound probes with miniature sizes and high sensitivity 11 . However, piezoelectric detectors are limited by the tradeoff between sensor size and sensitivity. For instance, a polyvinylidene (PVDF) needle hydrophone with a diameter of 75 μ m presents much lower sensitivity than that with ordinary size, with a noise-equivalent pressure (NEP) of 6 kPa over 100 MHz 12 . In recent years, a number of photonic ultrasound sensors have been developed with outstanding sensitivity, broad bandwidth and compact size [13][14][15] , optical transparency, and even possibility for non-contact measurement [16][17][18] . Photonic ultrasound sensors usually employ high-finesse optical resonators to detect incident elastic waves. For instance, a polymer micro-ring resonator (60 μ m in diameter) has presented 105 Pa NEP over a bandwidth of 350 MHz 19,20 . Ultrasound transducers based on planar Fabry-Perot (FP) cavity have reached a NEP of 210 Pa over 20 MHz bandwidth 21 . A reflection-mode PAM system using FP etalons for optical ultrasound detection has been developed 22,23 , which has achieved a NEP of 80 Pa and bandwidth of 18 MHz. The high sensitivity, however, raises its susceptibility to environmental disturbances. Complicated stabilization strategies have to be employed to enhance the resistance to external perturbations.Advanced fiber laser techniques have been developed for optical communication, sensing, measurement, ...

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“…1, which is based on a distributed Bragg reflector (DBR) fiber laser inscribed on an Er/Yb co-doped fiber by a 193-nm excimer [14]. The output power of the dual-frequency DBR laser is about -21 dBm, and the beat note power is about -10 dBm.…”

Section: Theory and Experimentsmentioning

confidence: 99%

Low-frequency vibration measurement by a dual-frequency DBR fiber laser

Zhang

¹

,

Cheng

²

,

Liang

³

et al. 2017

Photonic Sens

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A dual-frequency distributed Bragg reflector (DBR) fiber laser based sensor is demonstrated for low-frequency vibration measurement through the Doppler effect. The response of the proposed sensor is quite linear and is much higher than that of a conventional accelerometer. The proposed sensor can work down to 1 Hz with high sensitivity. Therefore, the proposed sensor is very efficient in low-frequency vibration measurement.

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Stabilization of microwave signal generated by a dual-polarization DBR fiber laser via optical feedback

Cited by 18 publications

References 23 publications

Fiber-Laser-Based Ultrasound Sensor for Photoacoustic Imaging

Fiber-Laser-Based Ultrasound Sensor for Photoacoustic Imaging

Fiber laser based ultrasound sensor for photoacoustic imaging

Low-frequency vibration measurement by a dual-frequency DBR fiber laser

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