Compact high-power tunable three-level operation of double cladding Nd-doped fiber laser

We present a compact high-power continuous-wave tunable neodymium-doped double cladding fiber laser operating on three-level 4F3/2 - 4I9/2 transition with a maximum output power up to 810 mW. At 926.7 nm, it has a maximum slope efficiency of 49.3% against absorbed 808-nm pump. By compressing the fiber Bragg grating, 15-nm tuning range is achieved

977-nm all-fiber DFB laser

Three-level operation of a fiber distributed feedback (DFB) laser operating around 980nm is demonstrated for the first time. The ytterbium-doped DFB laser shows a maximum slope efficiency of 61% and output power of 38.2mW under a launched single-mode pump power of 150mW at 910nm. The efficiency of lasers with different coupling strengths and at different pump wavelengths is also investigated

Three-level fiber DFB laser at 980 nm

A three-level fiber DFB-laser operating at 977nm is demonstrated for the first time using a 910nm pump diode. The fiber DFB laser shows 17.5mW output power under a launching power of 113mW

Intensity noise suppression in fibre DFB laser using gain saturated SOA

Experimental results of a simple, all-optical technique to reduce low-frequency intensity noise in an Er-Yb codoped fibre distributed feedback (DFB) laser are reported. This method utilises the gain dynamics of a saturated semiconductor optical amplifier (SOA) to produce a reduction of 30dB in the relaxation oscillation noise component of the fibre laser

Keyed axis single-polarisation all-fibre DFB laser

A single-polarised D-shaped fibre DFB laser with keyed axis output is demonstrated. The laser shows an output power of 3.8 dBm and strong axis alignment when spliced to a polarisation maintaining fibre

Single-polarization all-fibre DFB laser with keyed axis output

A single-polarized fiber DFB laser with keyed axis output is demonstrated from a D-shaped fiber configuration. The laser shows an output power of 3.8dBm and strong axis alignment when spliced to a polarization maintaining fiber

Relaxation oscillation noise suppression in fibre DFB lasers using a semiconductor optical amplifier

We report the experimental results of a simple, all optical technique to reduce the relative intensity noise peak of a fibre distributed feedback laser. A noise reduction of 30dB is achieved