正交线偏振(lin⊥lin)相干双色光作为光源可以用于实现性能较好的相干布居囚禁(CPT)原子钟。研究了用外腔式激光器(ECDL)出射光对受到微波调制的纵腔面发射激光器(VCSEL)产生的多色激光+1 级边带注入锁频，用主从锁频激光系统实现lin⊥lin 准双色光束方案，进而研究了所获光束的特性以及与原子作用实现CPT 共振的效果，获得一些有意义的结果。研究结果对于CPT原子钟研究有参考价值。

Using the bichromatic laser whose two frequency components are linearly polarized with the polarization directions orthogonal to each other (lin⊥lin), a better performance coherent population trapping (CPT) based atomic clock can be realized. A laser system is realized, which is a master-slave injection locking configuration with an external-cavity diode laser (ECDL) as the master and a microwave modulated vertical-cavity surface-emitting laser (VCSEL) as the slave by injection locking the + 1st sideband of the output multichromatic laser, and the quasibichromatic laser beam is obtained. The behaviors of the obtained beam and the effects of applying it to generate CPT resonance with atoms are experimentally studied, and some meaningful results provide helpful reference to CPT atomic clock related studies.