- A He Ne Laser Has 2 633 Nm Which Has A Confocal Cavity With R 0 8 M If The Cavity Length 0 5 M And Ri R2 97 A Lens 1 (70.46 KiB) Viewed 31 times
- A He Ne Laser Has 2 633 Nm Which Has A Confocal Cavity With R 0 8 M If The Cavity Length 0 5 M And Ri R2 97 A Lens 2 (76.49 KiB) Viewed 31 times
a He Ne laser has 2=633 nm which has a confocal cavity with (r) 0.8 m. If the cavity length 0.5 m and Ri=R2=97%, a lens of F number 1 the radius of the focused spot Calculate ... P vur call Beam 1 ty concet. 5- The radius of the focused spot 6-The gain coefficient 7-The longitudinal modes separation 8- the separation between pulses 9-number of modes oscillating 10-d pulse duration
ven a = 633 nm r= 0.8m L = 0.5 m Ri= R2 = 97% I Beam diameters in a confecal cavity W = 、 LA 27 0.5 x 6 33x10 9 ak -4 2.244X10 size Beam spot Beam dirogence = الما = 2 wo to. 4 3.174 x 10 633x10-9 = 8.98 x 10 m tx 2.244x10-4 -4 = 8.98x10 rad f=1 ALAS = 3x108 2x0.5 x A5 3x108 or od= 8 3x10 HZ 2 line width 2 x 0.5 DX = oda 12 x 63 X16 3x168 8 320* *(1 33 x1-9) = 4.0lxlo 1 x 10-13 Coherence time se=1 - 1 AS 3.33 x 10 See 3x168