kθ

z0

z

y

x

L

n

R1 R2

backfront

n

f

dL

P1 P2

τ’(x’)

x

f

x’

τ(x)

S=1.5 f S’

x’

d

Filter (center strip is opaque)

2x0

x0

laser D OS

PHWP

laserlaser DD OSOS

PHWP

q q

2d

zωω =r

m

vR

B

I Ia

w

+σ −σ

pressure

A B

pressurepressure

A B

Ip

| 0 >

| 1 >

| 2 >

T21

T10

Ip

| 0 >

| 1 >

| 2 >

T21

T10

d

R1 R2

z

Gain region, lg

R=0.99R=0.9

T=0.98T=0.98

12 cm

10 cm

LASER MEDIUM

Nonlinear medium

Mirror of radius of curvature R

d