Affiliation:
1. South China Normal University
Abstract
We demonstrate a GHz repetition rate mode-locked Tm3+-doped fiber laser with low noise. Based on a home-made Tm3+-doped barium gallo-germanate fiber with reduced dispersion, a broad optical spectrum of mode-locking is achieved, and its amplified spontaneous emission quantum-limited timing jitter is largely suppressed. Besides, we carefully investigate the influence of the intracavity pump strength on the noise performance of the mode-locked pulses and find that manipulating the intracavity pump power can be an effective method for optimizing the timing jitter and relative intensity noise (RIN). Particularly, RIN, which originated from the relaxation oscillation, can be effectively suppressed by 33 dB at offset frequencies of >1 MHz. The integrated timing jitter and RIN are only 7.9 fs (10 kHz–10 MHz) and 0.05% (10 Hz–10 MHz), respectively.
Funder
National Natural Science Foundation of China
NSFC Development of National Major Scientific Research Instrument
Mobility Programme of the Sino-German
Introduced Innovative Team Project of Guangdong Pearl River Talents Program
Natural Science Foundation of Guangdong Province
Science and Technology Planning Project of Guangdong Province
Subject
Atomic and Molecular Physics, and Optics