Key points are not available for this paper at this time.
A uniquely designed, mechanically tunable, bulk optical isolator for the 1.2 to 1.7 μm wavelength range is described. The isolator can be tuned for isolation better than 32 dB over the operating wavelength range with a forward loss ranging from -3.6 dB at 1.2 μm to -0.8 dB at 1.6 μm.
Jopson et al. (1985) studied this question.