Multiple wavelength Raman fibre laser with asymmetric cavities

Abstract

A low-cost Raman fibre laser for multiple wavelengths at 14xx nm has been proposed and demonstrated. Using asymmetric cavities, the Raman fibre laser provides flexible and easy complete solution of the desired multiple wavelengths output.

An all-fibre robust and tunable Raman fibre laser with reconfigurable asymmetric cavities

“…As recently reported in [19,21], for effective HR reflectors in high power Raman lasers, a bandwidth greater than 1.5 nm as well as a depth of at least 20 dB is required. The auxiliary resonating emission band at 1405 nm [16] does not appear in the initial state by concentrating energy to the 1410 nm laser, as seen in figure 4(a). Depending on the wavelength tuning, the FBG resonator with the Raman gain maxima, the 1405 nm, must be switchable.…”

“…Furthermore, it needs n pairs of tunable FBGs to generate n multiple and tunable outputs; thus it suffers from the complex nature of laser architecture and packaging as well as an increment of unit cost. To cope with these problems, we have recently proposed a novel RFL with an all-fibre asymmetrical laser cavity in 14xx nm [16]. The proposed laser scheme eventually reduces time consuming wavelength match conditions and widens the number of outputs and wavelengths.…”