Table 1 Typical values of InGaAsP multimode laser coupled with very-short external cavity used in the calculations
Symbol | Definitions of parameters | Value | Unit |
|---|---|---|---|
λ | Wavelength | 1550 | nm |
V | Active layer volume | 3 × 10−11 | cm3 |
L D | Length of active region | 120 | μm |
n D | Refractive index in active region | 3.6 | – |
R f | Power reflectivity at front facet | 0.2 | – |
a | Differential gain coefficient | 8.24 × 10−16 | cm2 |
N g | Carrier density at transparency | 3.69 × 107 | – |
ξ | Mode confinement factor | 0.15 | |
τ s | Carrier lifetime | 776 | ps |
τ p | Photon lifetime | 1.69 | ps |
τ in | Intraband relaxation time | 0.1 | ps |
B | Self-modal gain compression coefficient | 9.23 × 10−7 | s−1 |
b | Dispersion parameter of linear gain spectrum spectrumession coefficient | 5.0 × 1037 | m−3A−2 |
δλ | FWHM of spontaneous emission | 23 | nm |
L ex | Length of external cavity | 3.5 | mm |
n ex | Refractive index of external cavity | 1.0 | – |