ENE 623 Optical Networks. Lecture 7. Tunable Semiconductor Lasers. What determines lasing frequency: Gain spectrum A function of temperature. Optical length of cavity Mirror reflectance spectrum Any perturbation which affects refractive index and/or lasing frequency.
(A) Directional coupler geometry
(B) Mach-Zehnder configuration
Pout = Pin
Pout = 0
with E the applied electric field, assumed to be constant between the electrodes, and KTE = 5.8 x 10-10 m/V and KTM = 2.0 x 10-10 m/V. What is VTE and VTM ?
Note: neff = n0 + Δn in one arm and neff = n0 -Δn in the other arm.