Laser diodes with phase conjugate feedback
Laser diodes with phase conjugate feedback Laser diodes with phase conjugate feedback
Risø National Laboratory Four-wave mixing operation in high power diodes 0 L The nonlinear polarization is given by P= ε χ( N) E nc where χ( N) =− ( β+i)g(N) , g(N)=a(N-N 0) ω Z R=R 1 Z=0 R=0 Gain and refractive index gratings A 1 A 3 Semiconductor amplifier A 2 Electrode 0 Z=L dA1 * * =−α0A1− γ( AA 1 4 + A2A3) A4 (1A) dz * dA2 * * * * =+ α0A2 − γ( AA 1 4 + A2A3) A3 (1B) dz dA3 * * =+ α0A3+ γ( AA 1 4 + A2A3) A2 (1C) dz * dA4 * * * * =− α0A4 + γ( AA 1 4 + A2A3) A1 (1D) dz (1 − iβ ) g0 α0 =− is the effective gain 2(1 + P ) P 0 = E 0 P s 2 0 0 is the average intercavity pump intensity 2C γ=-i α0 is the coupling factor 1+ P Paul Michael Petersen, Laser Diodes with External Feedback (tutorial)
Risø National Laboratory DFWM in diodes using total internal reflection 0 Gain and refractive index gratings A 1 High reflective coating Z=0 Semiconductor amplifier Electrode L Z A 3 A 2 Z=L Antireflection coating Spatial- and temporal filtering Output beam M Paul Michael Petersen, Laser Diodes with External Feedback (tutorial)
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Risø National Laboratory<br />
Four-wave mixing operation in high power <strong>diodes</strong><br />
0<br />
L<br />
The nonlinear polarization is given by P=<br />
ε χ( N)<br />
E<br />
nc<br />
where χ( N) =− ( β+i)g(N) , g(N)=a(N-N<br />
0)<br />
ω<br />
Z<br />
R=R 1 Z=0<br />
R=0<br />
Gain and refractive<br />
index gratings<br />
A 1<br />
A 3<br />
Semiconductor<br />
amplifier<br />
A 2<br />
Electrode<br />
0<br />
Z=L<br />
dA1<br />
* *<br />
=−α0A1− γ( AA<br />
1 4<br />
+ A2A3) A4<br />
(1A)<br />
dz<br />
*<br />
dA2<br />
* * * *<br />
=+ α0A2 − γ( AA<br />
1 4<br />
+ A2A3) A3<br />
(1B)<br />
dz<br />
dA3<br />
* *<br />
=+ α0A3+ γ( AA<br />
1 4<br />
+ A2A3) A2<br />
(1C)<br />
dz<br />
*<br />
dA4<br />
* * * *<br />
=− α0A4 + γ( AA<br />
1 4<br />
+ A2A3) A1<br />
(1D)<br />
dz<br />
(1 − iβ<br />
) g0<br />
α0<br />
=− is the effective gain<br />
2(1 + P )<br />
P<br />
0<br />
=<br />
E<br />
0<br />
P<br />
s<br />
2<br />
0<br />
0<br />
is the average intercavity pump intensity<br />
2C<br />
γ=-i α0<br />
is the coupling factor<br />
1+<br />
P<br />
Paul Michael Petersen, <strong>Laser</strong> Diodes <strong>with</strong> External Feedback (tutorial)
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