scholarly journals Analysis of Kerr Noise in Angular-Rate Sensing Based on Mode Splitting in a Whispering-Gallery-Mode Microresonator

Micromachines ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 150 ◽  
Author(s):  
Zhaohua Yang ◽  
Dan Li ◽  
Yuzhe Sun
Keyword(s):  
Noise Suppression ◽  
Angular Rate ◽  
Whispering Gallery Mode ◽  
Measured Signal ◽  
Quality Factors ◽  
Whispering Gallery ◽  
Mode Splitting ◽  
Mathematical Expressions ◽  
The Relationship ◽  
Self Reference

Whispering-gallery-mode (WGM) microresonators have shown their potential in high-precision gyroscopes because of their small volume and high-quality factors. However, Kerr noise can always be the limit of accuracy. Angular-rate sensing based on mode splitting treats backscattering as a measured signal, which can induce mode splitting, while it is considered as a main source of noise in conventional resonator optical gyroscopes. Meanwhile, mode splitting also provides superior noise suppression owing to its self-reference scheme. Kerr noise in this scheme has not been defined and solved yet. Here, the mechanism of the Kerr noise in the measurement is analyzed and the mathematical expressions are derived, indicating the relationship between the Kerr noise and the output of the system. The influence caused by Kerr noise on the output is simulated and discussed. Simulations show that the deviation of the splitting caused by Kerr noise is 1.913 × 10−5 Hz at an angular rate of 5 × 106 °/s and the corresponding deviation of the angular rate is 9.26 × 10−9 °/s. It has been proven that angular-rate sensing based on mode splitting offers good suppression of Kerr noise.

Optical detection of nanoparticles by mode splitting in whispering-gallery-mode microcavities

2010 ◽  
Author(s):  
Jiangang Zhu ◽  
Sahin Kaya Ozdemir ◽  
Lina He ◽  
Da-Ren Chen ◽  
Lan Yang
Keyword(s):  
Optical Detection ◽  
Whispering Gallery Mode ◽  
Whispering Gallery ◽  
Mode Splitting

Optical Whispering-Gallery Mode Phenomenon as a Composite Sensor With Applications to Direct On-Chip Thermal Sensing

2013 ◽  
Author(s):  
Matthew Frenkel ◽  
Marlon Avellan ◽  
Zhixiong Guo
Keyword(s):  
Composite System ◽  
Whispering Gallery Mode ◽  
Quality Factors ◽  
Pressure Sensing ◽  
Whispering Gallery ◽  
Area Of Interest ◽  
Thermal Sensing ◽  
On Chip ◽  
Wgm Resonators ◽  
Very High

Optical Whispering-Gallery Mode (WGM) resonators can be fabricated with very high quality factors allowing for their use as high resolution sensors in a myriad of fields ranging from quantum electro-dynamics (QED) to pressure sensing. In this paper, we focus on integrating WGM as a dynamic temperature measurement device. The WGM sensors are fabricated onto the heating element, instead of acting as an indirect temperature sensor, allowing for direct monitoring of an area of interest. An adaptation to the WGM theoretical model, to include the thermal expansion of the composite system, is discussed and analyzed.

scholarly journals Advances in inorganic and hybrid perovskites for miniaturized lasers

Nanophotonics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 2251-2272 ◽  
Author(s):  
Zhengzheng Liu ◽  
Sihao Huang ◽  
Juan Du ◽  
Chunwei Wang ◽  
Yuxin Leng
Keyword(s):  
Carrier Lifetime ◽  
Optical Gain ◽  
Whispering Gallery Mode ◽  
Travelling Wave ◽  
Stimulated Emission ◽  
Narrow Linewidth ◽  
Quality Factors ◽  
Whispering Gallery ◽  
Fundamental Properties ◽  
Fabry Perot

AbstractThe rapid advancement of perovskite-based optoelectronics devices has caught the world’s attention due to their outstanding properties, such as long carrier lifetime, low defect trap density, large absorption coefficient, narrow linewidth and high optical gain. Herein, the photonic lasing properties of perovskites are reviewed since the first stimulated emission of perovskites observed in 2014. The review is mainly focused on 3D structures based on their inherently active microcavities and externally passive microcavities of the perovskites. First, the fundamental properties in terms of crystal structure and optical characteristics of perovskites are reviewed. Then the perovskite lasers are classified into two sections based on the morphology features: the ability/inability to support lasing behaviors by themselves. Every section is further divided into two kinds of cavities according to the light reflection paths (Standing wave for the Fabry–Pérot cavity and travelling wave for the Whispering-Gallery-Mode cavity). The lasing performance involves fabrication methods, cavity sizes, thresholds, quality factors, pumping sources, etc. Finally, some challenges and prospects for perovskite lasers are given.

scholarly journals Mode-Splitting for Refractive Index Sensing in Fluorescent Whispering Gallery Mode Microspheres with Broken Symmetry

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2987 ◽  
Author(s):  
Yvonne Kang ◽  
Alexandre François ◽  
Nicolas Riesen ◽  
Tanya Monro
Keyword(s):  
Refractive Index ◽  
Whispering Gallery Mode ◽  
High Refractive Index ◽  
Refractive Index Sensitivity ◽  
Whispering Gallery ◽  
Mode Splitting ◽  
Surrounding Environment ◽  
Novel Approach ◽  
Surrounding Refractive Index ◽  
Index Sensitivity

Whispering gallery mode (WGM) resonators have become increasingly diverse in terms of both architecture and applications, especially as refractometric sensors, allowing for unprecedented levels of sensitivity. However, like every refractometric sensor, a single WGM resonator cannot distinguish temperature variations from changes in the refractive index of the surrounding environment. Here, we investigate how breaking the symmetry of an otherwise perfect fluorescent microsphere, by covering half of the resonator with a high-refractive-index (RI) glue, might enable discrimination of changes in temperature from variations in the surrounding refractive index. This novel approach takes advantage of the difference of optical pathway experienced by WGMs circulating in different equatorial planes of a single microsphere resonator, which induces mode-splitting. We investigated the influence of the surrounding RI of the microsphere on mode-splitting through an evaluation of the sphere’s WGM spectrum and quality factor (Q-factor). Our results reveal that the magnitude of the mode-splitting increases as the refractive index contrast between the high-refractive-index (RI) glue and the surrounding environment increases, and that when they are equal no mode-splitting can be seen. Investigating the refractive index sensitivity of the individual sub modes resulting from the mode-splitting unveils a new methodology for RI sensing, and enables discrimination between surrounding refractive index changes and temperature changes, although it comes at the cost of an overall reduced refractive index sensitivity.

Observation of whispering-gallery mode splitting in spherical resonator

2007 ◽  
Vol 3 (3) ◽  
pp. 231-233 ◽  
Author(s):  
Guo-ping Lin ◽  
Lei Zhang ◽  
Le Ma ◽  
Ming-hao Sun ◽  
Hui-ying Xu ◽  
...  
Keyword(s):  
Whispering Gallery Mode ◽  
Spherical Resonator ◽  
Whispering Gallery ◽  
Mode Splitting

scholarly journals Interferometric detection of mode splitting for whispering gallery mode biosensors

2010 ◽  
Vol 97 (12) ◽  
pp. 123704 ◽  
Author(s):  
Joachim Knittel ◽  
Terry G. McRae ◽  
Kwan H. Lee ◽  
Warwick P. Bowen
Keyword(s):  
Whispering Gallery Mode ◽  
Whispering Gallery ◽  
Mode Splitting ◽  
Interferometric Detection
Sign in / Sign up

Export Citation Format

Share Document