A Fife firm is one of four high-tech growth companies to receive further investment totalling £3.9 million from Archangels and Scottish Investment Bank (SIB).
PowerPhotonic in Dalgety Bay designs, manufactures and supplies high-value optics that manipulate the light from lasers.
Its customers are involved in sectors ranging from defence to medicine.
PowerPhotonic will use the second £1m tranche of a £2m of investment round from Archangels and SIB last year to upscale its business development and manufacturing capacity, increasing its workforce from 20 to 28.
Dr Roy McBride, chief executive of the firm, said: “PowerPhotonic has entered a high growth phase and this second tranche of funding will enable us to further accelerate our expansion.
“Archangels and SIB have been with us from the start and I see them very much as partners, investing not just cash but the experience and connections from the Archangels network.”
Niki McKenzie, investment director at Archangels, said: “As investors, we know that it’s just as important for Archangels to provide ongoing growth capital as it is to find and invest in start-up companies in the first place.
“The companies who have received funding in these latest rounds are each Scottish success stories in their own right, selling their ideas, products and expertise around the world.”
Kerry Sharp, head of Scottish Investment Bank, said: “The Scottish Enterprise co-investment model allows us to invest alongside Archangels into Scottish companies that are at the forefront of bringing exciting new innovations to the market.
“These companies also work with Scottish Enterprise, helping them to build on their international growth success to date.
“All four companies are great examples of the quality of investment opportunities in Scotland and the ability of Scottish companies to compete on the international stage.”
The three other firms are all from Edinburgh Blackford Analysis, Fios Genomics and Administrate.
Blackford Analysis produces information systems that help clinicians to compare multiple images in medical disciplines.
Fios Genomics turns high-dimension, high-volume data into usable information for clients in pharmaceutical, biotech and academic sectors.
Administrate specialises in providing online training management software for education.