Mutual injection locking: a new architecture for high-power solid-state laser arrays

Theoretical study on phase locking of the array of fiber lasers coupled by bi-dimensional mutual injection

“…From the derivation in Appendix B, it can be found that (31) and (32) are not independent because (32) (or (31)) can be obtained with (30) and (31) (or (32)). Furthermore, it can be also seen that (18) is equivalent to (30) or (19) and (31) is indispensable to make (31) and (32) satisfied (see Appendix B). Till now, we get the sufficient conditions for phase locking of the array of mutually-injected lasers, i.e., (29)- (31).…”

“…Furthermore, it can be also seen that (18) is equivalent to (30) or (19) and (31) is indispensable to make (31) and (32) satisfied (see Appendix B). Till now, we get the sufficient conditions for phase locking of the array of mutually-injected lasers, i.e., (29)- (31). It means that, corresponding an N-laser array with S×S couplers, there should be [N+(S−1) N/2+M'] independent conditions to be satisfied to realize phase locking of the array (M' is the amount of the independent conditions given in (31) or (32)).…”

“…Till now, we get the sufficient conditions for phase locking of the array of mutually-injected lasers, i.e., (29)- (31). It means that, corresponding an N-laser array with S×S couplers, there should be [N+(S−1) N/2+M'] independent conditions to be satisfied to realize phase locking of the array (M' is the amount of the independent conditions given in (31) or (32)). 44 When these conditions can be satisfied, phase locking can be realized and the phase-locked states given as (17) will be exported from the array.…”

“…[28][29][30] The mutual-injection scheme was formerly used to build the solid-state laser array as a new architecture of high-power source. 31 Later, it was utilized to build the fiber laser array. Prior to the interference array (where only one port is used for output and the burden capability of the unique output port limits the power scaling of the whole array), [17][18][19][20][21][22][23][24][25][26] the array of mutually-injected fiber lasers adopts multiple output ports.…”

Diode-end-pumped linear-polarized single-frequency Tm:YAG laser at room temperature

“…As expected, the output laser is linear-polarization, measuring by the Glan-Taylor prism. Considered the wavelength matching between the seed laser and the power laser which is centered on 2.013 lm under free oscillating, that can improve the ratio of frequency locked significantly [10], the 0.1 mm F-P was tuned from the angle of 56.4°to 50.4°. Under this condition, the output wavelength is turned to 2.013 lm, as shown in Fig.…”