Double Pass L-Band EDFA with Unpumped EDF

Multiwavelength Generation in a Brillouin Semiconductor Fiber Laser

“…A second SOA (Alcatel 1901) with similar characteristics to that in the main ring was added to the feedback loop to increase the power of the reinjected wavelengths; without it, we were unable to obtain multiwavelength operation. The use of the second circulator for reinjecting the BSFL signals into the main ring provided greater stability and higher output power than the use of two couplers connected to the SMF in an inverted "S" configuration [1][2][3][4][5].…”

“…Multiwavelength generation in a fiber laser using a combination of both nonlinear Brillouin gain and linear gain in an Erbiumdoped fiber amplifer (EDFA) has been demonstrated [1]- [3]. While these hybrid Brillouin-Erbium implementations have proven to be successful, the operating band is limited to that of the EDFA gain [4,5]. In this paper, we experimentally demonstrate, for the first time, single and multiwavelength operation of a hybrid Brillouin-semiconductor fiber laser (BSFL).…”

Effects of output coupler reflectivity on the performance of a linear cavity Brillouin/erbium fiber laser

“…The double-pass through the EDF reduces the effective cavity loss and enhances the laser performance. Compared with the ring cavity system [3][4][5], the linear cavity BEFL system does not require an extra feedback loop to generate a multiple wavelength Stokes. There is also no optical isolator in the cavity to prevent injection locking of the BP wavelength.…”

“…The BEFL is capable of generating channels with a constant dense spacing of about 10 GHz (0.08 nm) at room temperature, offering higher channel densities up to 10 times as compared to the 100 GHz spacing in current systems [2]. Various approaches such as ring cavities and seed Brillouin signal feedback systems have been studied in order to generate multi-wavelength BEFL [3][4][5].…”

Extraction of a single Stokes line from a Brillouin fibre laser using a silicon oxynitride microring filter

“…Brillouin erbium doped fibre lasers (BEFLs) have been studied extensively for their capability to generate a comb of Stokes lines with spacing as narrow as 10 GHz, which is ideal for use as carriers in dense wavelength division multiplexing (DWDM) optical fibre communications systems [1][2][3][4]. Once generated, an individual Stokes line needs to be extracted to be modulated by the data signal.…”