Two-photon bioimaging with a multi-kilowatt peak-power optical pulse source using a 1-μm wavelength mode-locked semiconductor laser

2008 ◽  
Author(s):  
Hengchang Guo ◽  
Keijiro Takashima ◽  
Aya Sato ◽  
Hiroyuki Yokoyama ◽  
Masahito Mure ◽  
...  
Keyword(s):  
Semiconductor Laser ◽  
Peak Power ◽  
Optical Pulse ◽  
Pulse Source ◽  
Two Photon

Two-photon fluorescence bioimaging with an all-semiconductor laser picosecond pulse source

2007 ◽  
Vol 32 (18) ◽  
pp. 2726 ◽  
Author(s):  
Masaru Kuramoto ◽  
Nobuyoshi Kitajima ◽  
Hengchang Guo ◽  
Yuji Furushima ◽  
Masao Ikeda ◽  
...  
Keyword(s):  
Semiconductor Laser ◽  
Picosecond Pulse ◽  
Pulse Source ◽  
Two Photon ◽  
Fluorescence Bioimaging ◽  
Two Photon Fluorescence ◽  
Photon Fluorescence

Two-photon bioimaging utilizing supercontinuum light generated by a high-peak-power picosecond semiconductor laser source

2007 ◽  
Vol 12 (5) ◽  
pp. 054019 ◽  
Author(s):  
Hiroyuki Yokoyama ◽  
Hiroshi Tsubokawa ◽  
Hengchang Guo ◽  
Jun-ichi Shikata ◽  
Ki-ichi Sato ◽  
...  
Keyword(s):  
Semiconductor Laser ◽  
Peak Power ◽  
High Peak ◽  
Laser Source ◽  
High Peak Power ◽  
Two Photon

1  MW peak-power subpicosecond optical pulse source based on a gain-switched laser diode

2016 ◽  
Vol 41 (17) ◽  
pp. 4028 ◽  
Author(s):  
Yi-Cheng Fang ◽  
Tomohiro Chaki ◽  
Jui-Hung Hung ◽  
Hirohito Yamada ◽  
Hiroyuki Yokoyama
Keyword(s):  
Laser Diode ◽  
Peak Power ◽  
Optical Pulse ◽  
Pulse Source

Two‐photon excitation fluorescence microscopy using a semiconductor laser

Bioimaging ◽  
1995 ◽  
Vol 3 (2) ◽  
pp. 70-75 ◽  
Author(s):  
Pekka E Hänninen ◽  
Martin Schrader ◽  
Erkki Soini ◽  
Stefan W Hell
Keyword(s):  
Fluorescence Microscopy ◽  
Semiconductor Laser ◽  
Two Photon ◽  
Photon Excitation ◽  
Two Photon Excitation

Temporal pulse source generating far fields with sharp optical pulse

2021 ◽  
Vol 390 ◽  
pp. 127102
Author(s):  
Huilong Liu ◽  
Zonghua Hu ◽  
Zhenhua Du ◽  
Jing Xia ◽  
Aga He ◽  
...  
Keyword(s):  
Optical Pulse ◽  
Pulse Source ◽  
Far Fields ◽  
Temporal Pulse

scholarly journals Quantitative characteristic of phase signal with changed pulse in the coherent PHI-OTDR system

2020 ◽  
Author(s):  
Zhen Zhong ◽  
Xuping Zhang
Keyword(s):  
Pulse Width ◽  
Peak Power ◽  
Optical Pulse ◽  
Quantitative Characteristic ◽  
Maximum Amplitude ◽  
Observation Point ◽  
Electrical Signal ◽  
Rayleigh Backscattering ◽  
Phase Signal ◽  
Measured Phase

In the coherent PHI-OTDR system, the phase signal is retrieved based on the reference point and the observation point which are off and closer to the two sides of step of the phase change. In the experiment, the optical pulse with the changed peak power, width or shape is injected into the fiber for interrogating the change of the quantitative characteristic of the measured phase signal. When the pulse width is fixed at 200 ns and its peak power is adjusted from 14 dBm to -23 dBm, the amplitude is slightly increased from 17.3575 rad to 17.4411 rad as long as the Rayleigh backscattering signal can be found in the electrical signal. Changing the pulse width from 260 ns to 80 ns when the peak power is fixed at 14 dBm, the maximum amplitude and the minimum amplitude of the measured phase signal are 17.4625 rad to 17.4509 rad, respectively. When the arbitrary shape of the optical pulse generated from the MZI structure with a changed delay fiber from 3 m to 6 m, the amplitude varies from 17.4558 rad to 17.4819 rad. For every measurement, the change of frequency is also small. And the small value of standard deviation supports the accuracy of the measurement. All the measurements show that the changed pulse nearly has no impact on the quantitative characteristic of the measured phase signal in the coherent PHI-OTDR system. Moreover, we also find that the phase signal of external event can be correctly extracted as long as the Rayleigh backscattering signal can be detected.<br>

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