High sensitivity all-optical sampling for 40 Gb/s signals

2006 ◽  
Author(s):  
H. Sunnerud ◽  
M. Westlund ◽  
P.A. Andrekson
Keyword(s):  
High Sensitivity ◽  
Optical Sampling ◽  
All Optical

Ultra-sensitive all-optical sampling at 1.5 [micro sign]m using waveguide two-photon absorption

1999 ◽  
Vol 35 (17) ◽  
pp. 1483 ◽  
Author(s):  
B.C. Thomsen ◽  
L.P. Barry ◽  
J.M. Dudley ◽  
J.D. Harvey
Keyword(s):  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Optical Sampling ◽  
All Optical

scholarly journals An all-Optical Photoacoustic Sensor for the Detection of Trace Gas

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3967
Author(s):  
Thomas Lauwers ◽  
Alain Glière ◽  
Skandar Basrour
Keyword(s):  
High Sensitivity ◽  
Element Model ◽  
Remote Detection ◽  
Trace Gas ◽  
Lumped Element ◽  
Highly Sensitive ◽  
Fabry Perot ◽  
All Optical ◽  
Lumped Element Model ◽  
Acoustic Sensitivity

A highly sensitive Fabry–Perot based transduction method is proposed as an all-optical alternative for the detection of trace gas by the photoacoustic spectroscopy technique. A lumped element model is firstly devised to help design the whole system and is successfully compared to finite element method simulations. The fabricated Fabry–Perot microphone consists in a hinged cantilever based diaphragm, processed by laser cutting, and directly assembled at the tip of an optical fiber. We find a high acoustic sensitivity of 630 mV/Pa and a state-of-the-art noise equivalent pressure, as low as ~   2   μ Pa / Hz at resonance. For photoacoustic trace gas detection, the Fabry–Perot microphone is further embedded in a cylindrical multipass cell and shows an ultimate detection limit of 15 ppb of NO in nitrogen. The proposed optical trace gas sensor offers the advantages of high sensitivity and easy assembling, as well as the possibility of remote detection.

All-optical sampling with a monolithically integrated Mach–Zehnder interferometer gate

2001 ◽  
Vol 26 (9) ◽  
pp. 626 ◽  
Author(s):  
S. Fischer ◽  
M. Bitter ◽  
M. Caraccia ◽  
M. Dülk ◽  
E. Gamper ◽  
...  
Keyword(s):  
Zehnder Interferometer ◽  
Monolithically Integrated ◽  
Optical Sampling ◽  
All Optical ◽  
Mach Zehnder Interferometer
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