The government may impose safeguard duty on imports of single-mode optical fibre, as it has initiated a probe into sudden and significant surge in the inbound shipments of the product following a complaint from the domestic industry. According to a notification of the Directorate General of Trade Remedies (DGTR), an application has been filed by Sterlite TechnologiesNSE 2.50 % and Birla Furukawa Fibre Optics for imposition of safeguard duty on the fibre as the increase in imports is impacting them.