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自从1956年Bloembergen提出三能级固体量子放大器后,先后研制成功了利用下列顺磁晶体的量子放大器。 1.含钇Gd(Ⅲ)的乙基硫酸镧,La(C_2H_5SO_4)·9H_2O 2.含铬Gr(Ⅲ)的钻氰化钾,K_3Co(CN)_6 3.含铬Cr(Ⅲ)的氧化铝(红宝石),Al_2O_3 由于人造红宝石具有许多优越的物理性能与化学性能,例如适宜的零场分裂,0.383cm~(-1);具有较长的自旋——晶格弛豫时间,T～0.1秒(T=4.2°K);晶饱中只有一个铬离子;具有较小的介电损耗及高的介电常数,适用于行波放大;高的机械强度及化学稳
Since 1956, Bloembergen proposed a three-level solid-state quantum amplifier, has successfully developed the following quantum amplifiers using the following paramagnetic crystals. 1. La (C 2 H 5 SO 4) · 9H 2 O with lanthanum ethylsulfate containing Yttrium Gd (Ⅲ) 2. K 3 CN (CN_6) containing chromium Gr (Ⅲ) 3. Alumina containing Cr (Ruby), Al 2 O 3 Since artificial ruby has many excellent physical and chemical properties, such as suitable zero-field splitting, 0.383 cm -1; longer spin-lattice relaxation time, T ~ 0.1 Sec (T = 4.2 ° K); the crystal is saturated with only one chromium ion; it has small dielectric loss and high dielectric constant and is suitable for traveling wave amplification; high mechanical strength and chemical stability