A new scheme for a birefringent nonlinear polarization rotation mirror is proposed for pedestal suppression of ultrashort pulses. Environmentally stable and precisely controllable operation is demonstrated. The main pulse and pedestal components are separated and picked out from the different ports. By use of the soliton effect and nonlinear polarization rotation, almost transform-limited pedestal-free 318 and 143 fs ultrashort pulses with peak powers of 0.9 and 1.7 kW are successfully generated. The maximum pedestal-suppression ratio is 24 dB, and the pick-out efficiency is up to 46% including coupling loss. The characteristics are analyzed both experimentally and numerically.
Symmetric lipomatosis of the tongue (SLT) is a non-epithelial benign tumor with symmetrical adipose hyperplasia in bilateral tongue margins. SLT is a rare disease that is suggested to be associated with abnormalities in fat metabolism. The patient was a 66-year-old male with his history of alcoholic who had a large mass on the bilateral tongue margins. The tumor was resected under general anesthesia. Histopathological findings showed that the adipose tissue lacked a capsule and extended to the muscle tissue. SLT was diagnosed because lipomas with indistinct histopathological boundaries appeared on both sides of the tongue.
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