Laser Optics

daughterduckUrban and Civil

Nov 15, 2013 (3 years and 4 months ago)

49 views

Laser Optics


Parallel and large beam on table in laser room
(collimated)


No lenses along the way in current design


difficult to align in awkward places (shaft)


avoid extra sources of jitter


2" mirrors and lenses on diagnostic table


Triplet on table to adjust focus in undulator

Laser Optics


Simulatons

made

in
matlab

1.
Simple
ray
-
tracing

2.
Gaussian

ABCD
-
method


Simulations
using

Zemax

will

follow


Need

to
locate

waist

at laser


Need

to
know

M
2


Possibly

custom

lens
close

to laser for
collimation


Need

to
determine

the
delay

line

length


Tuning

curves

will

be
obtained

Laser Optics


λ=1030 nm


FWHM≈1 mm out from IR laser



Rayleigh length out from laser = 2.2 m



Rayleigh length at undulator = 1.1 m


Sigma at undulator = 0.3 mm



Laser Optics


Beam size along the way! Picture coming in!

8.4932e
-
004,1030E
-
9,1.5,4.6,4,50,
-
0.5,0.2208,0.5,1.475,
-
0.2,2.7

σ

/ m

Distance / m

DFD M
2
=1.5

1030E
-
9,1.5,3.0,4,50,
-
0.5
,0.233,
0.5
,1.408,
-
0.2
,2.9

Laser Optics


Beam size along the way! Picture coming in!

FDF M
2
=1.5

σ

/ m

Distance / m

1030E
-
9,1.5,10,8.3,50,
1.0
,0.65,
-
0.2
,0.18,
0.5
,3

Backup Below


Misc


Rayleigh length =
π
w
0
2
/
λ

1.

One
Optical

Table Solution

Optical Table(s)

Length from last lens to mid undulator ~2.7 m
if including height of periscope

OTR

OTR

BPM

Quad

Quad

Dipole

Dipole

Dipole

Undulator

Dipole

Dipole

Inlet

from
above

Telescope

L1&L2
movable

Real

Waist

Detection

diagnostic

L1 L2 L3

λ
/2
plate

Insertable

beam

splitter

Periscope

&
Translation

Virtual

Waist

movable

detector

Option 1

2.

Two

Optical

Tables

Solution

Optical Table(s)

2.

Two

Optical

Tables

Solution

Optical Table(s)

2.

Two

Optical

Tables

Solution

Optical Table(s)

2.

Two

Optical

Tables

Solution

Optical Table(s)

Bread

board
0.6x0.6
m

OTR

OTR

BPM

Quad

Quad

Dipole

Dipole

Dipole

Undulator

Dipole

Dipole

Real

Waist

Detection

diagnostic

Option 2

Optical

Table 3.6x0.9m

Inlet

from
above

Telescope

L1&L2
movable

L3 L2 L1

λ
/2
plate

Insertable

beam

splitter

Periscope

&
Translation

Virtual

Waist

movable

detector

Bread

board
0.6x0.6
m

OTR

OTR

BPM

Quad

Quad

Dipole

Dipole

Dipole

Undulator

Dipole

Dipole

Real

Waist

Detection

diagnostic

Option 2

Optical

Table 3.6x0.9m

Inlet

from
above

Telescope

L1&L2
movable

L3 L2 L1

λ
/2
plate

Insertable

beam

splitter

Periscope

&
Translation

Virtual

Waist

movable

detector

Laser Optics


Difference in reflectivity IR and UV

Dielectric mirrors

UV Enhanced Al mirrors