Modulator drivers and bias controllers

17th February 2016
Posted By : Joe Bush
Modulator drivers and bias controllers

A range of drivers and bias controllers have been made available by LASER Components to complement its range of phase and intensity modulators. The company’s phase and intensity modulators can be operated over a range of wavelengths from 780nm to 2.2µm, and at low speed up to 40GHz.

LASER Components‘ range of RF drivers are available in a range of speeds and types according to the input signal. Selecting the correct driver ensures the input signal is faithfully reproduced, with no ringing or distortion.

Examples include the digital, analogue and pulsed drivers. The digital amplifiers are designed for various speeds of data transmission up to 40GHz for both NRZ and RZ formats. The analogue drivers give linear amplification with low noise for applications such as radio over fibre. A separate driver is required for pulses because of their wider frequency content. These drivers generate clean optical pulses with sharp edges and no overshoot.

The company also offer a range of bias controllers for use with intensity modulators. Factors such as temperature fluctuations can cause variations between the two arms that form the interferometer of an intensity modulator, which is known as drift. For long term stability the company also offers bias controllers that use feedback to compensate for the drift. These are based on dithered and dither-free solutions as benchtop or OEM boards.

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