Cancellation of associated frequency dithering in a single-frequency compound-ring erbium-doped fiber laser

Efficient coherent beam combining of fiber lasers based on joint multiple access

“…Phase control is a key technique in CBC, which aims to compensate phase errors and achieve the phase locking of the combined lasers. According to the method of phase information detecting, active phase-control techniques can be divided into two categories [1]: direct phase-locking techniques such as the heterodyne detection phase-control technique [2,3], shearing interferometer method [4], and Hänsch-Couillaud detector method [5,6]; and indirect phaselocking techniques such as the stochastic parallel gradient descent algorithm [7][8][9][10] and single/multi-frequency dithering techniques [11][12][13][14][15][16][17][18].…”

“…The application of TDMA in the CBC has been relatively extensively developed [14][15][16][17][18], and in [26], we achieved phase locking based on CDMA in experiments. In this paper, we focus on verifying the feasibility of the JMA single-frequency dithering technique, trying to combine the code and TDMA in the phase-locking technique at the same time.…”