A solid-state optical filter at 1530 nm based on Voigt anomalous dispersion effect in rare earth ion-doped crystal.

This paper proposes an ultra-narrow band solid state optical filter with Voigt anomalous dispersion at 1530 nm based on Er: LiYF, sets a theoretical model for its realization of ultra-narrow band optical filtering, and performs simulations based on the model. The results show that the maxi-mum transmission of the filter is close to 80%, while the line-width is only in the order of 100 MHz, while its transmission peak can be tuned flexibly by adjusting the magnetic field. This filter has a natural advantage in space laser communications, which is another promising ultra-narrow band optical filter.

[Suprapubic lipectomy with a "Ω" incision for buried penis in obese adult men].

Objective: To investigate the application of suprapubic lipectomy with a "Ω" incision to removal of the prepubic fat pad for the management of buried penis in obese adult patients.

Methods: We retrospectively analyzed the clinical data on 20 obese adult patients with buried penis treated by suprapubic lipectomy via a "Ω" incision between August 2016 and September 2019.

Results: The operations were successfully completed in all the cases, with a mean operation time of 3.