求翻译：在波长819.9nm 和15oK低温下测得的光学双稳曲线，如图5.26所示。开关功率为200mW，开关的开启时间为1ps，关闭时间为40ns。发现在107oK下也观察到双稳曲线。是什么意思？

The optical bistability curve measured in the wavelength 819.9nm and 15ok, low temperature, as shown in Figure 5.26. The switching power is 200mw, the switch turn-on time of 1ps, the closing time of 40ns. Found in 107ok also observed in the bistable curve.

In wavelength 819.9 NM and 15 temperatures, oK measured optical-curve, as shown in Figure 5.26 . Switch to power 200 mW, switch to the open time, turn off the time PS1 is 40 NS. Found in the 107 have been observed oK bi-stable curves.

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In wavelength and 819.9nm optical bistable curves measured at low temperature, as shown in Figure 5.26. Switching power of 200mW, 1ps opening time of the switch, close time for 40ns. Bistable curves found in 107oK have been observed.

Optics bistable curve obtains which in wave length 819.9nm and under the 15oK low temperature, as shown in Figure 5.26.The switch power is 200mW, the switch opening time is 1ps, the closing hour is 40ns.The discovery also observes the bistable curve under 107oK.