Optronic weapons array

Alice was armed with an optronic weapons array

An optronic weapons array was a type of advanced weapon system that fired optronic pulses. The sentient starship Alice was equipped with an optronic weapons array operated by a neurogenic interface.

In 2376, Tom Paris, under the influence of Alice, stole a tactical data module from storage to fix the weapons array. While trying to take Alice back into the particle fountain, optronic pulses were fired to break free from Voyager's tractor beam. Two shots were sufficient to disrupt the tractor beam, while a third shot was a hit against Voyager's shields. (VOY: "Alice")

The weapons fire was not seen in the episode. The Federation phaser cannon was stated to be an optronically-targeted weapon in VOY: "Live Fast and Prosper".