Cost-effective high-spatial-resolution photon-counting optical time-domain reflectometry at 850  nm

Li, Bin; Zhou, Qiang; Zhang, Ruiming; Li, Junyi; Zhou, Heng; Li, Hao; Ling, Yun; Wang, Yunxiang; Deng, Guangwei; Wang, You; Shi, Lin; Qiu, Kun; Song, Hai‐Zhi

doi:10.1364/ao.57.008824

Cited by 8 publications

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has achieved a dynamic range of up to ∼50.0 dB with the spatial resolution of around one kilometer [3]. However, due to the limitation of the detection bandwidth of photodetector (PD) [4], it is challenging to meet those high-end monitoring areas that require high spatial resolution, such as fiberto-the-home (FTTH), airborne optical fiber network, and so on. With the development of single-photon detection technology, photon counting OTDR (PC-OTDR) based on a single photon detector (SPD) has received increasing attention because of its better spatial resolution and higher dynamic range [5][6][7].…”

Section: Compiled October 28 2019mentioning

confidence: 99%

Dispersion independent long-haul photon-counting optical time-domain reflectometry

Zhang

Wang

et al. 2020

Opt. Lett.

Self Cite

View full text Add to dashboard Cite

Photon counting optical time-domain reflectometry (PC-OTDR) based on the single photon detection is an effective scheme to attain the high spatial resolution for optical fiber fault monitoring. Currently, due to the spatial resolution of PC-OTDR is proportional to the pulse width of a laser beam, short laser pulses are essential for the high spatial resolution. However, short laser pulses have a large bandwidth, which would be widened by the dispersion of fiber, thereby causing inevitable deterioration in spatial resolution, especially for longhaul fiber links. In this letter, we propose a scheme of dispersion independent PC-OTDR based on an infinite backscatter technique. Our experimental results -with more than 50 km long fiber -show that the spatial resolution of the PC-OTDR system is independent with the total dispersion of the fiber under test. Our method provides an avenue for developing the long-haul PC-OTDR with high performance.

show abstract

Section: Compiled October 28 2019mentioning

confidence: 99%

Dispersion independent long-haul photon-counting optical time-domain reflectometry

Zhang

Wang

et al. 2020

Opt. Lett.

Self Cite

View full text Add to dashboard Cite

show abstract

High Dynamic Range Externally Time-Gated Photon Counting Optical Time-Domain Reflectometry

Song

Zhou

et al. 2019

J. Lightwave Technol.

Self Cite

View full text Add to dashboard Cite

Single photon detector (SPD) has a maximum count rate due to its dead time, which results in that the dynamic range of photon counting optical time-domain reflectometry (PC-OTDR) decreases with the length of monitored fiber. To further improve the dynamic range of PC-OTDR, we propose and demonstrate an externally time-gated scheme. The externally time-gated scheme is realized by using a high-speed optical switch, i.e. a Mach-Zehnder interferometer, to modulate the back-propagation optical signal, and to allow that only a certain segment of the fiber is monitored by the SPD. The feasibility of proposed scheme is first examined with theoretical analysis and simulation; then we experimentally demonstrate it with our experimental PC-OTDR testbed operating at 800 nm wavelength band. In our studies, a dynamic range of 30.0 dB is achieved in a 70 meters long PC-OTDR system with 50 ns external gates, corresponding to an improvement of 11.0 dB in dynamic range comparing with no gating operation. Furthermore, with the improved dynamic range, a successful identification of a 0.37 dB loss event is detected with 30-seconds accumulation, which could not be identified without gating operation. Our scheme paves an avenue for developing PC-OTDR systems with high dynamic range.

show abstract

Dense Temporally Multiplexed Fiber Bragg Grating Sensing Based on Single-Photon Detection

Fan

Zhang

et al. 2022

J. Lightwave Technol.

View full text Add to dashboard Cite

Cost-effective high-spatial-resolution photon-counting optical time-domain reflectometry at 850 nm

Cited by 8 publications

References 12 publications

Dispersion independent long-haul photon-counting optical time-domain reflectometry

Dispersion independent long-haul photon-counting optical time-domain reflectometry

High Dynamic Range Externally Time-Gated Photon Counting Optical Time-Domain Reflectometry

Dense Temporally Multiplexed Fiber Bragg Grating Sensing Based on Single-Photon Detection

Contact Info

Product

Resources

About