Description
The US Naval Observatory is seeking a high-power 423nm laser system and a digital laser locking device. The laser system should have a frequency-doubled laser centered at 423 nanometers with a fundamental at 846 nm, and the digital laser locking device should be capable of locking to high finesse cavities or frequency combs and phase locking between lasers. The system must meet specific requirements, including a linewidth of 10kHz or less, a mode-hop free tuning range of 15GHz, and a generated 423 nm output of at least 1000 mW. The contractor will be responsible for delivering the system to the Naval Observatory in Washington, D.C.
Key features of the required system include:
• High-power 423nm laser system with a frequency-doubled laser
• Digital laser locking device with a bandwidth of 50 MHz and a linewidth of less than 1 Hz
• Auto-tuning of the alignment of the source laser into the tapered amplifier and the amplified output into the second harmonic generation stage
• Auto-relocking of the resonant bow-tie cavity used for frequency doubling
• Electro-optic modulator for the SHG stage to remove residual frequency or amplitude modulation
• Final spatial mode out of the frequency doubler must be well-shaped and collimated