The Calgary man who slashed his 11-month-old baby with a knife was sentenced to five years in custody today.

The 33-year-old man pleaded guilty to aggravated assault. The incident happened late one night after the baby's mother did not return home.

Police were called to a house in the southeast community of Cranston in August 2011 just after 4 a.m. They arrived to find an infant in critical condition, with knife slashes on his neck and torso.

The baby lost a quarter of his blood and had to undergo emergency surgery.

911 call made by the father was heard in court in April. The man can be heard crying as he professes his love for the baby. After police arrive, the man is heard on the phone begging officers to shoot him.

Court also heard that the baby’s parents had broken up and the mother had gone out that night. The father became agitated and angry when she did not return.

Defence lawyer Alain Hepner said Friday that his client was remorseful, and felt he should be punished.

"The child was 11-months-old and he was the parent and that's really the crux of the matter from the judge's point of view and understandably."

The Crown’s Margot Engley said the mother and grandmother were relieved that the case didn’t have to go to trial.

"They didn't have to go through testifying at a trial. That gave them some comfort it was a very emotional, obviously, incident for them and hopefully they'll be able to move on with their life now that this case is finished."

Neither parent is being named as to protect the identity of the child.

The man has served one year and two weeks already, so he has just under four years left to serve.

"He knew what he was doing and he intended the harm he caused," said Judge Michael Dinkel after handing down the sentence.