In 2002 Iran established a pilot uranium laser enrichment plant at Lashkar Ab'ad, and between 2002 and 2003 conducted enrichment experiments with 22kg of undeclared natural uranium metal.[1] Tehran purchased most of the equipment for the plant from foreign suppliers, and reportedly intended to produce 5kg of uranium with an enrichment level of up to 7% in the first year of operation using the atomic vapor laser isotope separation (AVLIS) method.[2] Iran initially denied the IAEA access to the site, removed some equipment, and declared that the facility was conducting research on laser fusion research and laser spectroscopy.[3] Tehran later admitted that it had conducted laser enrichment experiments at the site, and several IAEA inspections determined that the AVLIS facility was able to produce small quantities of highly-enriched uranium.[4] However, the facility never became fully operational due to Iran's inability to purchase critical equipment, such as electron beam guns, from abroad.[5] Iran dismantled the AVLIS equipment in 2003 and shipped it to the Karaj Agricultural and Medical Center, where it remains in storage.

Sources:
[1] Yonah Alexander and Milton M. Hoenig, The New Iranian Leadership (London: Praeger Security International, 2008), p. 140.
[2] Anthony H. Cordesman and Adam C. Seitz, Iranian Weapons of Mass Destruction: The Birth of a Regional Arms Race (Washington, DC: Center for Strategic and International Studies, 2009), p. 243.
[3] "Implementation of the NPT Safeguards Agreement in the Islamic Republic of Iran," International Atomic Energy Agency (IAEA), 10 November 2003, www.iaea.org.
[4] "Implementation of the NPT Safeguards Agreement in the Islamic Republic of Iran," International Atomic Energy Agency (IAEA), 1 September 2004, www.iaea.org.
[5] "Implementation of the NPT Safeguards Agreement in the Islamic Republic of Iran," International Atomic Energy Agency (IAEA), 1 September 2004, www.iaea.org.