====== Frequency fluctuation effects general ======

$$ \frac{\Delta f}{f} = - \frac{\Delta L}{L} - \frac{\Delta n}{n} +\delta_{lock}$$ 

^ Effects of fluctuation    ^  Part of fluctuation         ^   Reduction of effect         ^  Measurement method ^
| Vibration                 |   $$   \frac{\Delta L}{L} $$    | stable mounting design & passive/active vibration isolation                        | |
| Temperature                |   :::   | thermal isolation from environment: temperature stabilized vacuum chamber & heat shields                         | |
| Acustic                  |   :::     | acoustic isolation box & vacuum chamber                          | |
| Intensity                  |   :::   | intensity stabilization                      | |
| Vacuum                  |   $$ \frac{\Delta n}{n} $$   | low pressure & stable pressure                             | |
| Lock PDH                  |   $$ \delta_{lock} $$   | temperature stabilization of EOM & using Glan thompson polarizer                          | |
| Lock RAM                  |   :::   |    :::                          | |
| Beam pointing                  |   ?    |                                    | |
| Brownian noise                  |   ?    |    <color #ff0000>see XX</color>                                | |