Fundamental Transverse Mode Selection (TMS#0) of Broad Area Semiconductor Lasers with Integrated Twice-Retracted 4<i>f</i> Set-Up and Film-Waveguide Lens

<div><i>Current concept again:</i> another sketch (now with oblique view) of a TMS#0-BAL with compact linear<i> f</i> long laser resonator<i> (4f retracted twice)</i> and spatial filter to support the fundamental transverse mode (#0). The dimensions are given and the waveguide lens (“wg. lens”) is depicted.</div>

Advances in OptoElectronics

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Figure 3: Fundamental Transverse Mode Selection (TMS#0) of Broad Area Semiconductor Lasers with Integrated Twice-Retracted 4<i>f</i> Set-Up and Film-Waveguide Lens 

Figure 3 | Fundamental Transverse Mode Selection (TMS#0) of Broad Area Semiconductor Lasers with Integrated Twice-Retracted 4f Set-Up and Film-Waveguide Lens 