Characteristics of linewidth-narrowed distributed Bragg reflector lasers with a fiber external cavity formed with the vertical grating emission

Cook, Anthony; Hendricks, Herbert D.

doi:10.1109/50.372429

Cited by 1 publication

(1 citation statement)

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“…www.nature.com/scientificreports www.nature.com/scientificreports/ We chose a spectral line spacing (12.7 MHz) close to the plateau to modulate DFB diode laser and DBR laser seeds, respectively. Due to the inherent current noise, the linewidth of DFB laser is generally wider than that of DBR laser 18,19 . The spectrum of DFB laser is broadened relative to DBR laser.…”

Section: Discussionmentioning

confidence: 99%

1.27 kW, 2.2 GHz pseudo-random binary sequence phase modulated fiber amplifier with Brillouin gain-spectrum overlap

Liu

Yang

Shen

et al. 2020

Sci Rep

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We present a 2.2 GHz modulated, 1.27 kW output power, monolithic fiber amplifier based on pseudorandom binary sequence (PRBS) phase modulation. The spectral line spacing of maximizing the threshold enhancement factor (plateau of trend) was found by theoretical simulation. The spectral line spacing was adjusted to 12.7 MHz by a pattern length of n = 9, which is close to the plateau of trend in the proposed architecture. A 2.2 GHz low-pass radio frequency filter was used to control the FWHM of the seed. A four-stage Yb-doped fiber amplifier chain was established to boost a distributed Bragg reflector (DBR) laser and a distributed feedback (DFB) diode laser to 1.2 kW and 1.27 kW with a backward reflectively of <1‰, which shows a good suppression of SBS effect. open Scientific RepoRtS | (2020) 10:629 | https://doi.org/10.1038/s41598-019-57408-5www.nature.com/scientificreports www.nature.com/scientificreports/ fiber, which is used to boost a DFB diode laser and a DBR fiber laser to 1.27 kW and 1.2 kW, respectively. The backward reflectively is measured to be <1‰. To the best of our knowledge, this is the highest power level for narrow linewidth fiber amplifier based on phase control under 5 GHz spectral linewidth.

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Section: Discussionmentioning

confidence: 99%