Single-polarization cladding-pumped Yb-doped fiber laser

Abstract

Yb-doped cladding-pumped fiber laser with linearly-polarized output emission was realized. To obtain linear-polarization operation we have applied Bragg grating written in the fiber with high birefringence as the input reflector. The polarization extinction ratio was of 17 dB. A maximum output power of 12 W was achieved with an efficiency slope of 69%. The laser linewidth was less than 0.1 nm even for maximum output power.

All-fiber normal-dispersion single-polarization passively mode-locked laser based on a 45°-tilted fiber grating

“…Adjusting the polarization controller (PC) outside of the laser cavity, the polarization extinction ratio (PER) of output pulses is measured as ~26 dB, which indicates that the pulse is linearly polarized. Linear polarization is an attractive feature in optical parametrical devices, interferometric fiber sensors, active crystals, and nonlinear frequency conversion [25]. Up to now, several methods to obtain single-polarization operation of fiber laser have been reported, for example, distributed feedback fiber lasers, the fiber Bragg gratings polarization selection technique and so on.…”

5kW High peak power, 0.2mJ high pulse energy, linearly-polarized pulsed laser from a single all-fiber oscillator

“…The second type of method is making polarization state selection by coinciding reflectivity peaks of different cavity mirrors. Paramonov et al reported an all-fiber design launched in CW-regime using a GTWave fiber as gain medium, in which two PM fiber Bragg grating (FBG) were used as high reflective mirror and output coupling mirror [5]. Polarization selection was achieved by aligning the reflective wavelength of output coupling FBG to one of two reflective wavelengths.…”

Effect of active fiber birefringence on polarization properties of DBR all-fiber laser

“…In the past two decades, The linear cavity with distribute Bragg reflective (DBR) structure made of fiber Bragg gratings (FBGs) was used to obtain stable single frequency output in the field of fiber laser [9][10][11][12][13][14][15][16]. There are two reflective peaks sepa rated by the wavelength and polarization orthogonal when the FBG is imprinted in the polarization main taining fiber (PM FBG).…”