Current Status@???

1
Current Status_at_???

• Cavity Lcav420mm, Super-Invar
• Mirror ?210.5mm, R99.7
• Laser Mode-lock(714MHz) or CW

2
Waist size???

• ???
• ??????????????
• X1.47mm
• Y1.48mm
• ?w050um???
• ????1.21mm
• ????????????
• ???????????
• ?Lcav/FSRarccos(1-Lcav/?)/?
• ? 0.030 (???0.031) ????

60um???????
?Lcav
3
Mode-Lock ?????

• ??????????(50100mHz) ? 0.51kHz??????????????????
  ??
• ????????????????Study

4
CW laser

• ???????????????????????????????Mode-Lock
  Laser??????????Robust

5
CW feedback
PZT
PD
laser
?????? ???
GND
PZT controller
Integrator
DC supply
6
CW feedback
PID raw signal
Error signal
Closed loop
Scan mode
Error signal
7
CW Laser
Cavity?(??????)??????????????????????????
8
?????????????

• ????????????????? (????????)

9
???????Chamber?Cavity?????

• Chamber ??
• ????????24???27.2
• ??? Chamber?10-8 Torr, ???????10-9 Torr
• ????? ?????? ??? ????????
• ???? ???????
• ??????????????????
• ???????????????
• Chamber ? 750??
• ??????????
• Cavity
• ???????????????1015?
• SUS304?316???????????
• ???
• ????(210.5mm)????(25.4f, t15)????99.9??