Axial-mode selectivities for various types of integrated twin-guide lasers

Wavelength dependencies of the gains, namely the axial-mode selectivities, of various types of integrated twin-guide (ITG) injection lasers are given theoretically. The double-resonator type, the distributed Bragg reflector (DBR), and the two tandem-connection types of ITG lasers are considered. The axial-mode selectivities are also discussed briefly in relation to the efficiencies.