Broadband ASE source using bismuth-based erbium-doped fibers in double-pass set-up

Abstract

antenna peak gain is larger than 2 dB in the operation frequency band. The simulated and measured results show that the present antenna not only obtains a broad VSWR bandwidth (2.5-11 GHz) covering the UWB frequency band (3.1-10.6 GHz) but also has good radiation performance in the UWB band. CONCLUSIONSA novel design of a broadband antenna for UWB WUSB flash disk is presented. The proposed antenna mainly consists of the Baseband module shielding boxes and the RF module shielding boxes. The reuse of the two shielding boxes is equivalent to reduce the space requirements for the antenna (no other radiators are needed). A shorting tube is introduced to solve the problem of routing signal wires between the baseband module and the RF module, which also miniaturize the antenna size. Due to its small space requirements and UWB behavior, the antenna has wide and potential applications for the UWB communication systems such as WUSB devices.

1880-nm Broadband ASE Generation With Bismuth–Thulium Codoped Fiber

“…Unlike lasers, ASE sources do not rely on optical feedback, and thus, the full-width half-maximum (FWHM) bandwidth of the backward ASE is generally very broad, typically greater than 10 nm. The most common fiber ASE source comprises a single-mode pump that energizes a length of Er-doped singlemode silica fiber, typically in tens of meter, to emit at 1550 nm [1], [2]. Recently, ASE sources operating around mid infrared spectral region have gained tremendous interest for possible applications in spectroscopy, gas sensing, low-coherence interferometer, and medical imaging via optical coherence tomography.…”