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groups:mg:project_ptb-cavity:linewidth [2017/10/24 09:55] – created ssauergroups:mg:project_ptb-cavity:linewidth [2017/10/24 11:10] (current) – ssauer
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-====== Calcualtion of linewidth ======+====== Calcualtion of linewidth and FSR ======
  
 ==Parameter== ==Parameter==
-    * Radius of curvature of mirror R1: R1= 1 m 
-    * Radius of curvature of mirror R2: R2= 1 m 
     * Cavity Length: L= 0.48 m     * Cavity Length: L= 0.48 m
-    * Reflectivity of mirrors: R= 0.99998 
     * Speed of light: c= 299792458 m/s     * Speed of light: c= 299792458 m/s
 +    * Finesse: F= 107.000 aus [[https://iqwiki.iqo.uni-hannover.de/doku.php?id=groups:mg:project_ptb-cavity:finesse_assessment_for_vacuum|Finesse assessment for vacuum]]
  
-$$FSR = \frac{c}{2\cdot L}$$   +Freier Spektralbereich: 
-$$Gouy = \frac{FSR}{\pi} \cdot \arccos \left( \sqrt{(1-\frac{L}{R1})\cdot(1-\frac{L}{R2}} \right)$$ +$$FSR = \frac{c}{2\cdot L} -> FSR = 312.284 MHz$$  
-$$F = ... $$  +
  
 +Linienbreite:
 +$$\delta \nu = \frac{FSR}{F} -> \delta \nu = 2.927,88 Hz $$  
  
-=> 
-  * FSR = 312.284 MHz 
-  * Gouy = 101.783 MHz