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groups:mg:comb [2016/12/13 13:08] – steffengroups:mg:comb [2018/08/31 13:57] (current) – removed ssauer
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-====== Frequency Comb ====== 
-{{ :groups:mg:frequenzkammspektrum.png?600|}} 
-===== Setup ===== 
-===Typical Values=== 
-  * Laser diode current: 9.0 
-  * AC: 950, DC: 850 (in Fiber laser software) 
-  * Powers:  
-    * after fiber laser: ~ 200 mW @ 1560 nm  
-    * after SHG:  
-      * ~ 3 W @ 780 nm  
-      * ~ 95 mW @ 1550 nm  
-    * direct after filter: 
-      * ~ 32 mW @ 780 nm  
-    * direct infront PCF: 
-      * ~ 300 mW @ 780 nm without filter  
-      * ~ 20 mW @ 780 nm with filter  
-      * ~ 8 mW @ 1550 nm without filter  
-    * after PCF:  
-      * ~ 8.5 mW @ 780 nm without filter (red light should be visible) 
-      * ~ 1.8 mW @ 780 nm with filter  
-      * ~ 250 µW @ 1550 nm without filter 
-  * Clock Laser / DUT ~ 5 mW; FWHM << 100 MHz 
-  * (right picture is an old measurement and we don´t know where in the comb) 
-  * CEO frequency has a linewidth of ~500kHz 
-    * yellow = good lock 
-    * white = bad lock, because the platform and width 
-{{:groups:mg:ceo-frequency.png?600|}} 
- 
-===Regular problems=== 
- 
-  * Comb has to be optimized almost every day: Most of the times just tuning potis @ SHG & PCF is enough  
-  * Low power in general: Maybe pump diodes should be exchanged (15.09.2016: 145 mW Output @ 9.5) 
-  * Fiberlaser software does not start: Maybe wrong COM Port: Change @ Windows Device Manager 
-  * FiberLaser software starts, but Fiber Comb does not: Maybe NI card not attached properly 
-  * You can´t lock CEO and Reprate, than restart the hole lasersysteme [probable all ~1-2 months]. 
- 
-===Turn off and on=== 
- 
- 
-  * Turn off the frequency comb: 
-    - Push Amplifier button (LED off) 
-    - Push Laser button (LED off) 
-    - turning the upper key (position 0) 
-    - turning the lower key (position 0) 
-  * Turn on: 
-    - exactly the other way arround 
- 
-{ {:groups:mg:img_1863.jpg?300| }} 
- 
- 
-=== WHICH output=== 
-Data under ResLab: D:\Dokumente\Daten\Frequenzkamm\Spektren 161115 1064 nm Port.\\ 
-{{:groups:mg:img001_2_.jpg?300|}} 
- 
-===Rf-output-fiber=== 
-  * measured with optical spectrumanalysizer from AG-Morgner 
-  * Resolution: for peak 0.2nm and full range measurement 1.5nm  
-  * pdf-files: {{ :groups:mg:frequency_comb_spectrum_rf-fiber-output.pdf |}}{{ :groups:mg:frequency_comb_spectrum_rf-fiber-output_full_range_.pdf |}} 
-{{:groups:mg:fibercomb_range1.jpg?600|}}{{:groups:mg:fibercomb_range2.jpg?600|}} 
- 
- 
-==== Manuals and Datasheets ==== 
-  * Software for [[.:FiberLaser|FiberLaser]]  
-  * Software for [[.:Fiber Comb Control|Fiber Comb Control]] 
- 
- 
-==== Pictures from the inside of the frequency comb ==== 
-{{:groups:mg:20161114_160543.jpg?600|}}{{:groups:mg:20161114_160551.jpg?600|}}\\ 
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-{{:groups:mg:20161114_144313.jpg?400|}}{{:groups:mg:20161114_144329.jpg?400|}}{{:groups:mg:20161114_144335.jpg?400|}}{{:groups:mg:20161114_144305.jpg?400|}}\\ 
-{{:groups:mg:20161114_145325.jpg?400|}}{{:groups:mg:20161114_145342.jpg?400|}}{{:groups:mg:20161114_145537.jpg?400|}}{{:groups:mg:20161114_145543.jpg?400|}}{{:groups:mg:20161114_145355.jpg?400|}}{{:groups:mg:20161114_145403.jpg?200|}}\\  
-{{:groups:mg:20161114_144537.jpg?400|}}\\ 
-{{:groups:mg:20161114_160512.jpg?400|}}{{:groups:mg:20161114_160518.jpg?400|}}{{:groups:mg:20161114_160525.jpg?400|}} 
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