| abstract |
A silicon-based narrow linewidth high-power external cavity laser based on transverse magnetic mode, comprising a reflective semiconductor optical amplifier, a spot size converter, a phase shifter, a first micro-ring filter, a second micro-ring filter, a Sage Nanogram mirrors and mode converters, the present invention forms a filtering structure through the vernier effect of two micro-ring filters, and can obtain a wide tuning range and narrow line width laser. Taking advantage of the advantages of transverse magnetic mode in semiconductor optical amplifier with small linewidth enhancement factor, small transmission loss and high power upper limit in silicon waveguide, the laser linewidth can be further compressed and the output laser power can be increased. Devices also have greater process tolerances. The mode converter is used at the laser output end to convert the transverse magnetic mode to the transverse electric mode, which can be integrated with other optical signal processing devices based on the transverse electric mode. |