Low-Noise, Narrow-Linewidth Laser Systems, 1550 nm

• Company: Thorlabs Inc.
• Type: Diode
• Max. Power: 145mW
• Classification (IEC): Class 1M
• Wavelength: 1500nm
• Wavelength - Tunable?: Yes
• Operating Mode: Continuous
• Applications: Remote Sensing, Scientific Research, Other
• Typical Output Power: ULN: 120 mW; DFB: ≥100 mW
• Typical Linewidth: ULN: 100 Hz; DFB: 50 Hz
• RIN (dBc/Hz): ULN: -160; DFB: -150
• Typical SMSR: ULN: 70 dB; DFB: 50 dB
• PER: ULN: >18 dB; DFB: 23 dB
• Current Modulation: Up to 20 MHz

Thorlabs' single-frequency, turnkey, low-noise laser systems are ready-to-use laser systems that integrate our ULN15PC or DFB1550P diodes with a low-noise driver and temperature stabilization inside of a benchtop housing. To minimize the laser linewidth and relative intensity noise (RIN), these lasers include drive electronics that are designed to minimize the current noise. An isolator is integrated at the output of the lasers to minimize the impact of any back-reflected light on the lasers.

The ULN15TK is an ultra-low-noise (ULN) laser system based on a hybrid external-cavity semiconductor laser employing a fiber Bragg grating (FBG) for feedback to the laser cavity.

The DFB15TK is based on a distributed feedback (DFB) cavity on the laser chip, providing single-frequency emission with typical relative intensity noise (RIN) of -150 dBc/Hz and typical linewidths of 50 kHz.

These lasers are designed with laser frequency locking applications in mind.