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常见问题解答：

Q: Does NS device drift over time and temperature?

A: NS devices are based on electro-optical crystal materials that can be influenced to a certain range by the environmental variations. The insertion loss of the device is only affected by the thermal expansion induced miss-alignment. For extended temperature operation, we offer special packaging to -40 -100 0C. The extinction or cross-talk value is affected by many EO material characters, including temperature-dependent birefringence, Vp, temperature gradient, optical power, at resonance points (electronic). However, the devices are designed to meet the minimum extinction/cross- talk stated on the spec sheets. It is important to avoid a temperature gradient along the device length.

Q: What is the actual applying voltage on the device?

A: 100 to 400V depending on the version.

Q: How does the device work?

A: NS devices are not based on Mach-Zander Interference, rather birefringence crystal’s nature beam displacement, in which the crystal creates two different paths for beams with different polarization orientations.

Q: What is the limitation for faster operation?

A: NS devces have been tested to have an optical response of about 300 ps. However, practical implementation limits the response speeds. It is possible to achieve a much faster response when operated at partial extinction value. We also offer resonance devices over 20MHz with low electrical power consumption.

典型响应速度测量

典型带宽测量

筱晓光子 1064nm电光开关使用说明

1.      将光开关模块上电，散热系统开始工作；

2.      将1064nm激光从光开关的输入端接入，此时可以观测到正向输出端不通光，反向输出端通光；

3.      光开关模块中有一SMA输入端口，为开关调制信号的输入端，识别TTL电平。输入低电平时，光从反向端口输出，输入高电平时，光从正向端口输出。将其与信号源连接，输入脉冲信号，以视频中的信号为例：频率2MHz、高电平1.6V（输出阻抗50欧）、低电平0V、脉宽100ns；

4.      在正向输出端连接PD采集脉冲光信号，与信号源的信号比较。反向输出端则会得到反相结果；

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