Multi-wavelength mode-locked Er/Yb Co-doped fiber laser with square nano-second pulse output

Ye, W.; Wang, J.; Chen, Tao; Shen, Yonghang

doi:10.1134/s1054660x11170294

Cited by 6 publications

(7 citation statements)

References 23 publications

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“…The corresponding physical mechanism has been revealed by solving the cubic-quintic Ginzburg-Landau equation [19][20][21][22]. Several techniques of mode locking have been utilized to achieve high energy wave-breaking-free rectangular pulse by DSR at different wavelength band, such as the technique of nonlinear polarization rotation [23][24][25][26], SESAM-based mode locking [27], figure-eight fiber lasers [28][29][30], and Graphene oxide based mode locking [31]. However, almost all of them are passively mode locking.…”

Section: Introductionmentioning

confidence: 99%

Flexible rectangular wave-breaking-free pulse generation in actively mode-locked ytterbium-doped fiber laser

Chen¹,

Chen²,

Jiang³

et al. 2014

Opt. Express

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We demonstrate nanosecond scale rectangular wave-breaking-free pulse generation in an actively mode locked Yb-doped fiber laser based on a combined action of active periodic cavity loss modulation and nonlinear polarization rotation effect. The pulse width of the laser can be controlled in the range of 890 ps to above 124 ns instantaneously by adjusting the electrical signal applied on the modulator. As high as 19.8 nJ wave-breaking-free pulse is achieved with maximum available pump power. The output pulse temporal dynamics exhibit various distinct characteristics under different modulation and polarization control. The laser presents unusually flexible tunabilities in pulse width, pulse energy and pulse shape.

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Section: Introductionmentioning

confidence: 99%

Flexible rectangular wave-breaking-free pulse generation in actively mode-locked ytterbium-doped fiber laser

Chen¹,

Chen²,

Jiang³

et al. 2014

Opt. Express

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“…High power fiber lasers have received much attention in recent years owing to their inherent advantages such as high beam quality, high output power and low operating costs [1][2][3][4][5][6][7][8][9][10]. Laser-induced plumes are an essential physical phenomenon during high power fiber laser welding and their parameters are closely correlated to the welding process.…”

Section: Introductionmentioning

confidence: 99%

Plume temperature diagnosis with the continuous spectrum and Wien’s displacement law during high power fiber laser welding

et al. 2014

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The laser-induced plume is an essential physical phenomenon during high power fiber laser welding. Its physical nature can be investigated by diagnosing its temperature. In order to overcome the lack of sufficient line spectra in the temperature diagnosis, the continuous spectrum method (based on the continuous spectrum and Wien's displacement law) is thus developed in this research. The optical spectra emitted by the plume or plasma were detected by using a SP-2500i spectrometer during bead-on-plate welding with an IPG YLS-6000 fiber laser or fiber laser-arc hybrid. The rationality of the continuous spectrum method was evaluated by comparing the plasma temperatures diagnosed by applying the continuous spectrum and line spectra. The results reveal that the continuous spectrum method used in temperature diagnosis is rational. When the line spectra cannot be detected due to an increase in detected height, the plume temperature can be still obtained by using the continuous spectrum method.

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“…Optical fibre lasers with a figure-of-eight configuration have been reported for multi-wavelength emission using both erbium-doped fibre [3] and erbium-ytterbium co-doped fibre [4][5][6] as the gain medium. The inclusion of an optical filter in the loop can be decisive in achieving good output stability [7].…”

Section: Introductionmentioning

confidence: 99%

Torsion sensor based on a figure-of-eight cavity fibre laser

et al. 2013

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A figure-of-eight based fibre laser cavity is proposed for the measurement of torsion. In one of the loops a section of photonic crystal fibre is inserted, acting both as an optical filter and the sensing head. The laser emission depends on the optical filter polarization and length. A single lasing band is achieved with a full width at half maximum of ∼1.72 nm. The proposed sensor presents sensitivity to torsion of 7.13 pm/degree over a range of 180 •. This configuration can also be used to measure optical power variations. Besides, due to the properties of the optical filter this sensor presents low sensitivity to temperature.

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Multi-wavelength mode-locked Er/Yb Co-doped fiber laser with square nano-second pulse output

Cited by 6 publications

References 23 publications

Flexible rectangular wave-breaking-free pulse generation in actively mode-locked ytterbium-doped fiber laser

Flexible rectangular wave-breaking-free pulse generation in actively mode-locked ytterbium-doped fiber laser

Plume temperature diagnosis with the continuous spectrum and Wien’s displacement law during high power fiber laser welding

Torsion sensor based on a figure-of-eight cavity fibre laser

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