Kirill R. Safronov, Vladimir O. Bessonov, Daniil V. Akhremenkov, Maxim A. Sirotin, Maria N. Romodina, Evgeny V. Lyubin, Irina V. Soboleva, and Andrey A. Fedyanin"Miniature Otto Prism Coupler for Integrated Photonics"Laser & Photonics Reviews 1621005422022 download