All optical, high contrast absorptive modulation in an asymmetric Fabry–Perot étalon

1991 ◽  
Vol 58 (25) ◽  
pp. 2877-2879 ◽  
Author(s):  
J. F. Heffernan ◽  
M. H. Moloney ◽  
J. Hegarty ◽  
J. S. Roberts ◽  
M. Whitehead
Keyword(s):  
High Contrast ◽  
Fabry Perot ◽  
All Optical

Organic nonlinear Kerr materials in Fabry-Perot cavities for all optical switching

2006 ◽  
Author(s):  
Nikolaj Moll ◽  
Selim Jochim ◽  
Stephan Gulde ◽  
Rainer F. Mahrt ◽  
Bert J. Offrein
Keyword(s):  
Optical Switching ◽  
Fabry Perot ◽  
All Optical ◽  
All Optical Switching

Normally‐off high‐contrast asymmetric Fabry–Perot reflection modulator using Wannier–Stark localization in a superlattice

1990 ◽  
Vol 56 (19) ◽  
pp. 1886-1888 ◽  
Author(s):  
K‐K. Law ◽  
R. H. Yan ◽  
J. L. Merz ◽  
L. A. Coldren
Keyword(s):  
High Contrast ◽  
Fabry Perot

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.

scholarly journals All-Optical Ultra-Fast Graphene-Photonic Crystal Switch

Crystals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 461 ◽  
Author(s):  
Mohammad Reza Jalali Azizpour ◽  
Mohammad Soroosh ◽  
Narges Dalvand ◽  
Yousef Seifi-Kavian
Keyword(s):  
Photonic Crystal ◽  
Integrated Circuits ◽  
Contrast Ratio ◽  
Fast Response ◽  
High Contrast ◽  
Switching Operation ◽  
Optical Integrated Circuits ◽  
All Optical ◽  
The Difference ◽  
Silicon Rods

In this paper, an all-optical photonic crystal-based switch containing a graphene resonant ring has been presented. The structure has been composed of 15 × 15 silicon rods for a fundamental lattice. Then, a resonant ring including 9 thick silicon rods and 24 graphene-SiO2 rods was placed between two waveguides. The thick rods with a radius of 0.41a in the form of a 3 × 3 lattice were placed at the center of the ring. Graphene-SiO2 rods with a radius of 0.2a were assumed around the thick rods. These rods were made of the graphene monolayers which were separated by SiO2 disks. The size of the structure was about 70 µm2 that was more compact than other works. Furthermore, the rise and fall times were obtained by 0.3 ps and 0.4 ps, respectively, which were less than other reports. Besides, the amount of the contrast ratio (the difference between the margin values for logics 1 and 0) for the proposed structure was calculated by about 82%. The correct switching operation, compactness, and ultra-fast response, as well as the high contrast ratio, make the presented switch for optical integrated circuits.

Sign in / Sign up

Export Citation Format

Share Document