A US judge has sentenced Emma Coronel Aispuro, the wife of jailed Mexican drug lord Joaquin 'El Chapo' Guzman, to three years in prison on charges of drug trafficking and money laundering.

The sentence was less than the four years requested by prosecutors, with the judge acknowledging that Coronel was only a teenager when she married the ruthless drug czar and she readily pleaded guilty after her February 2021 arrest.

Coronel apologised to the court, speaking in Spanish before the sentence was announced said: "I express my true regrets for any and all harm that I may have done.

"I am suffering as a result of the pain that I caused my family."

She asked the judge to make it possible that she be allowed to raise her twin nine-year-old daughters.

"They are already growing up without the presence of one of their parents," she said.

"I beg you to please not allow them to grow up without the presence of their mother."

'Minimal' role in cartel

The judge said she would also pay $1.5 million in a restitution deal agreed before the hearing, and that she would be given credit for nine months already spent behind bars since her arrest.

Prosecutors and her defence lawyers alike described Coronel as not involved in the core business of Guzman's Sinaloa Cartel, which shipped hundreds of tonnes of cocaine, heroin, methamphetamine and other drugs into the United States, according to the US Justice Department.

"The defendant's actual role was a minimal one," said prosecutor Anthony Nardozzi.

"The defendant was not a leader, organiser, boss or other type of manager. Rather she was a cog in a very large wheel of a criminal organisation," he told the court.

But the prosecution also noted that Coronel had a key role in helping her husband escape from a Mexican prison in 2015.

'The defendant opted to take responsibility for her actions' - prosecutor

Nevertheless, Mr Nardozzi said, "the defendant opted to take responsibility for her actions" immediately after her arrest.

Pronouncing her sentence, Judge Rudolph Contreras wished Coronel good luck.

"I hope that you raise your twins in a different environment than you've experienced to date," he told her.

Thirty-two years her husband's junior, Coronel met him in her mid-teens and they married when she turned 18.

Coronel became the object of intense fascination when she regularly joined the audience at his trial in New York after he was extradited from Mexico in 2017.

Coronel would smile at Guzman and blow him kisses as she attended the trial almost every day for three months, sometimes bringing their daughters so they could see their father.

Guzman was sentenced in July 2019 to life in prison.

Despite her closeness to one of the world's most notorious drug traffickers, she was able to move in and out of the United States freely until she was arrested on arrival at Dulles International Airport outside Washington in February 2021.

Months later she pleaded guilty to all three trafficking and laundering counts against her.

Coronel's attorney, Jeffrey Lichtman speaks to the media after today's hearing

Outside the courthouse today, Coronel's attorney Jeffrey Lichtman pushed back at reports that she had cooperated with government investigators probing the drug business, reports that he said had left her in danger of retribution.

Because she had no criminal record and readily admitted guilt, skipping a trial, Mr Lichtman said, the Justice Department's sentencing guidelines stipulated a relatively short prison term.

"The guidelines were so low there was no need to cooperate," he said.

"She will be out of jail in 18 months," he predicted.