Injection locking of photonic-crystal surface-emitting lasers

Key Points

• Optical injection locking effectively aligns the phase of high-power PCSELs with that of a smaller seed laser, enhancing their output stability.
• The lasing wavelength shows a significant dependence on the seed laser, with locking achieved despite the power difference by several orders of magnitude.
• Photonic-crystal surface-emitting lasers are controlled through injection locking, which stabilizes their output characteristics for better performance.
• This technique offers promising applications in tunable laser sources and improved optical systems, highlighting the versatility of PCSEL technology.