Development of Single-Longitudinal-Mode Selection Technology for Solid-State Lasers

Table 1

Comparison of advantages and disadvantages of typical SLM selection technology.

Method	Advantage	Disadvantage
Short cavity method	The most direct method, simple structure	Low power, low stability
Etalon method	Simple structure can generate relatively high power	Introduce insertion loss, threshold dependent
Traveling wave cavity method
Nonplanar	Compact structure, strong stability	High processing requirements, limited tuning range
Discrete ring	A variety of components can be inserted, with good mode selection effect	Complex structure
Twisting cavity	Compact structure, easy to realize	Sensitive to polarization, greatly affected by thermal effects
VBG method	Low-temperature influence, high stability	Low precision, limited operating spectral range
Seed injection	High-power operation can be achieved	Seed light has a big impact on output
Compound cavity method	Low temperature influence, high stability	Poor selection of single structure
Nonlinear crystal method	Frequency conversion	Relay on the properties of nonlinear optical materials, quantum defect
Multistructure combination	High precision	Complex structure, poor stability