Abstract

A tunable laser optical source equipped with wavelength and mode-hop monitors was developed to compensate for thermal expansion of the medium in holographic data storage. The laser's tunable range is $402–409\text{\hspace{0.17em} nm}$, and supplying $\text{90 mA}$ of laser diode current provides an output power greater than $\text{40 mW}$. The aberration of output light is less than $\text{0.05}\lambda \text{rms}$. The temperature range within which the laser can compensate for thermal expansion of the medium is estimated based on the tunable range, which is $\pm \text{13.5}°\text{C}$ for glass substrates and $\pm \text{17.5}°\text{C}$ for amorphous polyolefin substrates.

© 2007 Optical Society of America

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