44.6  fs pulses from a 257  MHz Er:fiber laser mode-locked by biased NALM

Wanli Gao; Guanyu Liu; Zhigang Zhang

doi:doi:10.3788/COL201816.111401

Chinese Optics Letters, 2018, 16 (11): 111401, Published Online: Nov. 11, 2018

44.6 fs pulses from a 257 MHz Er:fiber laser mode-locked by biased NALM

Wanli Gao ^*Guanyu Liu Zhigang Zhang

Author Affiliations

State Key Laboratory of Advanced Optical Communication System and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China

Figures & Tables

Fig. 1. Schematic of the mode-locked fiber laser based on the NALM. HWP, half-wave plate; PBS: polarizing beam splitter; WDM‐Collimator, a combination of a collimator and wavelength division multiplexer; FR, Faraday rotator; HR, high reflection mirror.

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Fig. 2. The average output power as a function of pump 2 power. Pump 1 power was fixed to 650 mW.

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Fig. 3. Radio frequency spectrum at the resolution bandwidth of 1 kHz.

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Fig. 4. Measured spectra of output pulses. The modulation state of the spectra can be changed by rotating the λ/8 wave plate in the cavity. (a) Highly modulated spectrum, with an output power of 104 mW. (b) Less modulated spectrum, with an output power of 135 mW.

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Fig. 5. Fringe-resolved autocorrelation trace of output pulses.

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Fig. 6. PICASO retrieved intensity and phase of the output pulse. The retrieved pulse duration is 44.6 fs.

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Wanli Gao, Guanyu Liu, Zhigang Zhang. 44.6 fs pulses from a 257 MHz Er:fiber laser mode-locked by biased NALM[J]. Chinese Optics Letters, 2018, 16(11): 111401.

44.6 fs pulses from a 257 MHz Er:fiber laser mode-locked by biased NALM

Fig. 1. Schematic of the mode-locked fiber laser based on the NALM. HWP, half-wave plate; PBS: polarizing beam splitter; WDM‐Collimator, a combination of a collimator and wavelength division multiplexer; FR, Faraday rotator; HR, high reflection mirror.

Fig. 2. The average output power as a function of pump 2 power. Pump 1 power was fixed to 650 mW.

Fig. 3. Radio frequency spectrum at the resolution bandwidth of 1 kHz.

Fig. 4. Measured spectra of output pulses. The modulation state of the spectra can be changed by rotating the λ/8 wave plate in the cavity. (a) Highly modulated spectrum, with an output power of 104 mW. (b) Less modulated spectrum, with an output power of 135 mW.

Fig. 5. Fringe-resolved autocorrelation trace of output pulses.

Fig. 6. PICASO retrieved intensity and phase of the output pulse. The retrieved pulse duration is 44.6 fs.

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44.6 fs pulses from a 257 MHz Er:fiber laser mode-locked by biased NALM

Fig. 1. Schematic of the mode-locked fiber laser based on the NALM. HWP, half-wave plate; PBS: polarizing beam splitter; WDM‐Collimator, a combination of a collimator and wavelength division multiplexer; FR, Faraday rotator; HR, high reflection mirror.

Fig. 2. The average output power as a function of pump 2 power. Pump 1 power was fixed to 650 mW.

Fig. 3. Radio frequency spectrum at the resolution bandwidth of 1 kHz.

Fig. 4. Measured spectra of output pulses. The modulation state of the spectra can be changed by rotating the λ/8 wave plate in the cavity. (a) Highly modulated spectrum, with an output power of 104 mW. (b) Less modulated spectrum, with an output power of 135 mW.

Fig. 5. Fringe-resolved autocorrelation trace of output pulses.

Fig. 6. PICASO retrieved intensity and phase of the output pulse. The retrieved pulse duration is 44.6 fs.

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