  We reduce the intensity noise of laser light by using an electro-optic
modulator and a cousto-optic modulator in series. The electro-optic modulator
reduces noise at high frequency(10 kHz to 1 MHz), while the acousto-optic
modulator sets the average power of the light and reduces noise at low
frequency (up to 10 kHz). The light is then used to trap single sodium atoms in
an optical tweezer, where the lifetime of the atoms is limited by parametric
heating due to laser noise at twice the trapping frequency. With our noise
eater, the noise is reduced by up to 15 dB at these frequencies, and the
lifetime is increased by an order of magnitude to around 6 seconds. Our
technique is general and acts directly on the laser beam, expanding laser
options for sensitive optical trapping applications.
