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Entry   Coupling efficiency improvement, posted by Xinyi Lu at Optical room about lasers and optics beam_after_lens.png
    Reply   Coupling efficiency improvement, posted by Xinyi Lu at Optical room about lasers and optics Screenshot_2024-03-08_0_172245.png
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          Reply   Injection at the amplifier current of 2 A, posted by Xinyi Lu at Optical room about lasers and optics 21kW_power_at_2A_injection.png
             Reply   Polarization issue, posted by Xinyi Lu at Optical room about lasers and optics Screenshot_2024-03-20_0_090501.pngScreenshot_2024-03-20_4_110622.pngM3_window.png
                Reply   Polarization issue, posted by Xinyi Lu at Optical room about lasers and optics 
                   Reply   Polarization issue & 50kW with 22W injection, posted by Xinyi Lu at Optical room about lasers and optics 50kW_with_22W_injection.png50_kW_power_at_3A_injection.png
Message ID: 196     Entry time: Thu Mar 7 18:55:42 2024     Reply to this: 197
 Author: Xinyi Lu 
 Status: Fixed 
 Type: info 
 Category: lasers and optics 
 Location: Optical room 
 Title: Coupling efficiency improvement 

- These days, Ronic, Fatematuj and I measured the beam parameters of the output of the third-stage amplifier.

- We used 2 wedges and reflection filters to reduce the intensity on the CCD.

- We measured multiple points at pump current of 2 A (output power ~10 W). The waist diameter of the output is w_x = 792.26 um, w_y=873.90 um.

- The next step is to design the telescope and improve the coupling efficiency.

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