The police constable, Schrikrishna Schwenke, was suspended last month after he was arrested.
He pleaded guilty to the charges when he appeared in the district court on Monday.
The Police Commissioner, Fuiavailili Egon Keil, said all officers, including himself, should be professional and strive to gain the trust of the public by upholding and obeying the law.
Meanwhile an internal inquiry is being carried out against a police inspector for allege breaches of the police code of conduct.
