High-power solid-state sapphire whispering gallery mode maser

2010 ◽  
Vol 57 (3) ◽  
pp. 641-646 ◽  
Author(s):  
D.L. Creedon ◽  
K. Benmessai ◽  
M.E. Tobar ◽  
J.G. Hartnett ◽  
P.-Y. Bourgeois ◽  
...  
Keyword(s):  
Solid State ◽  
High Power ◽  
Whispering Gallery Mode ◽  
Whispering Gallery

High power solid-state sapphire Whispering Gallery mode maser

2009 ◽  
Author(s):  
Daniel L. Creedon ◽  
Karim Benmessai ◽  
Michael E. Tobar ◽  
John G. Hartnett ◽  
Pierre-Yves Bourgeois ◽  
...  
Keyword(s):  
Solid State ◽  
High Power ◽  
Whispering Gallery Mode ◽  
Whispering Gallery

A 120 GHz high-power whispering-gallery mode gyrotron

1993 ◽  
Vol 74 (1) ◽  
pp. 137-151 ◽  
Author(s):  
T. SHIMOZUMA ◽  
T. KIKUNAGA ◽  
H. ASANO ◽  
Y. YASOJIMA ◽  
K. MIYAMOTO ◽  
...  
Keyword(s):  
High Power ◽  
Whispering Gallery Mode ◽  
Whispering Gallery

scholarly journals Physics of the sapphire whispering-gallery-mode solid-state MASER oscillator

2020 ◽  
Vol 91 (3) ◽  
pp. 31001
Author(s):  
Mohamad Mrad ◽  
Ahmad Tarhini ◽  
Pierre-Yves Bourgeois ◽  
Vincent Giordano
Keyword(s):  
Solid State ◽  
Theoretical Work ◽  
Whispering Gallery Mode ◽  
Frequency Stability ◽  
Rate Equations ◽  
Sapphire Crystal ◽  
Whispering Gallery ◽  
Available Technology ◽  
Stable Source ◽  
Quantum Equations

The Cryogenic Sapphire Oscillator (CSO) is currently the best available technology that can provide a relative frequency stability better than 10−15 with integration times between 1 s and 10,000 s. But, the CSO remains a complex instrument that requires multiple loop controls to achieve the best frequency stability. The possibility to use the sapphire resonator in a self-sustained MASER oscillator presents an elegant alternative to the CSO. Here, sustaining the amplification is achieved through the interaction between a high-Q factor whispering gallery mode and the paramagnetic Fe3+ ions, which are present in small concentration in the sapphire crystal. The Fe3+ ion exhibits three energy states enabling to realize a self-sustaining solid-state maser. Although, this principle has been already experimentally demonstrated few years ago, its development as a truly usable ultra-stable source has not yet been completed, mainly due to the lack of control of the complex physical phenomena involved. This paper complements the previous theoretical work based on the rate equations model. Here we derive the full quantum equations describing the evolution of the Fe3+ ions inside the sapphire lattice and submitted to a pump and a maser signal. The influence of the ions concentration and spin-spin relaxation time will be pointed out.

scholarly journals Initial operation of a high-power whispering-gallery-mode gyrotron

1987 ◽  
Author(s):  
K. Felch ◽  
L. Ives ◽  
E. Jongewaard ◽  
H. Jory ◽  
S. Spang
Keyword(s):  
High Power ◽  
Whispering Gallery Mode ◽  
Initial Operation ◽  
Whispering Gallery
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