Quasi-optical conversion of the output from a whispering-gallery-mode gyrotron to a free-space beam with arbitrary power and phase distributions across both transverse dimensions of the beam

1990 ◽  
Author(s):  
J. A. Lorbeck
Keyword(s):  
Free Space ◽  
Whispering Gallery Mode ◽  
Arbitrary Power ◽  
Whispering Gallery ◽  
Optical Conversion

Free-space coupling to symmetric high-Q terahertz whispering-gallery mode resonators

2019 ◽  
Vol 44 (9) ◽  
pp. 2220 ◽  
Author(s):  
Dominik Walter Vogt ◽  
Angus Harvey Jones ◽  
Rainer Leonhardt
Keyword(s):  
Free Space ◽  
Whispering Gallery Mode ◽  
High Q ◽  
Whispering Gallery

scholarly journals Study of free-space coupling into mm-wave whispering-gallery mode resonators for a radioastronomy receiver

2017 ◽  
Author(s):  
Gabriel Santamaria-Botello ◽  
Kerlos Atia Abdalmalak ◽  
Maria-Theresa Schlecht ◽  
David Gonzalez-Ovejero ◽  
Florian Sedlmeir ◽  
...  
Keyword(s):  
Free Space ◽  
Whispering Gallery Mode ◽  
Whispering Gallery

scholarly journals High-Sensitivity Whispering Gallery Mode Humidity Sensor Based on Glycerol Microdroplet Volumetric Expansion

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1746
Author(s):  
Pauls Kristaps Reinis ◽  
Lase Milgrave ◽  
Kristians Draguns ◽  
Inga Brice ◽  
Janis Alnis ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Free Space ◽  
Humidity Sensor ◽  
Low Cost ◽  
High Sensitivity ◽  
Whispering Gallery Mode ◽  
Whispering Gallery ◽  
Volumetric Expansion ◽  
Highly Sensitive ◽  
Good Repeatability

We demonstrate a highly sensitive whispering gallery mode (WGM) relative humidity (RH) sensor based on a glycerol microdroplet. WGMs were excited using a 760 nm tunable semiconductor laser. We used free space coupling, which is effective when using a liquid resonator. A detailed analysis of different parameters influencing the sensor’s characteristics (sensitivity, hysteresis, resolution, stability, and temperature) is presented. The sensitivity of the sensor is one of the highest reported (2.85 nm/% RH in the range 50–70% RH with the resolution 1 × 10−4% RH). This type of humidity sensor has several advantages, such as high sensitivity, extended lifetime, good repeatability, and low cost, as well as the use of a non-toxic and environmentally friendly liquid.

Evaluation of Effective Conductivity of Copper-Clad Dielectric Laminate Substrates in Millimeter-Wave Bands Using Whispering Gallery Mode Resonators

2009 ◽  
Vol E92-C (12) ◽  
pp. 1504-1511 ◽  
Author(s):  
Thi Huong TRAN ◽  
Yuanfeng SHE ◽  
Jiro HIROKAWA ◽  
Kimio SAKURAI ◽  
Yoshinori KOGAMI ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Effective Conductivity ◽  
Whispering Gallery Mode ◽  
Whispering Gallery
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