LD9721 为USB接口光功率计。它的采样周期可达到微秒量级，更快速 地采集和处理数据。

LD9721 光功率计模块采用USB通讯接口，可直接与PC机进行通讯，通 过Demo程序显示数据和设置参数。LD9721 高速光功率计模块可用于高精 密波分复用DWDM元件，AWG/PLC元件和其他通用的光纤的光学测量应用。 相较于其他型号的功率计，LD9721具有高速采样的特点，并且外形小巧、 尤其适用于组装成多种形式，多个通道的光功率计采样系统。

LD9721 is a USB interface optical power meter module. It’s sampling period achieves microsecond, and can collects and processes data at a high rate of speed.

The LD9721 optical power meter module provides a USB communication port connected with the PC. The operator uses its Demo program to control the LD9721, views the measurement values and sets the parameters. The LD9721 optical power mete module offers superior performance in testing DWDM components , AWG&PLC components, optical amplifiers, and performing other general-purpose fiber optical test and measurement applications. Compared with other power meter modules, LD9721 features high speed sampling and compact dimension and It is especially suitable for the optical power meter sampling system which is assembled into various forms and multiple channels.