Main Specification

Ultra-Low Noise Fiber Laser

Single Frequency Fiber laser with low Relative Intensity Noise (RIN) have wide application in quantum optics, pumping lasers, lidar, coherent optical communications, high-precision optical sensing, optical measurement, and precision spectroscopy. For example, the laser for trapping atoms in optical lattice demands not only high output power, but also low RIN to reduce the resonance between the lattice and atoms and low frequency noise (FN) to reduce the spatial vibration, which is quite important for the atoms lifetime in the lattice. In the atomic interferometer and atomic clock application, high power laser could lead to more atoms, uniform interaction area and high measurement SNR.

Fig. 1, Schematic of the low noise fiber laser.
*The doubler module is equipped with SHG model

 

PreciLasers offers high power low noise 1064 nm and 1550 nm fiber laser with low FN and low RIN seed + low noise fiber amplifier shown in Fig. 1. In Fig. 2, the amplifier will not introduce the extra frequency noise and the linewidth broadening is measured to be less than 1 Hz. The RIN of the amplifier is ultra-low(RIN<-140 dBc/Hz (>5 kHz), RIN integration from 10 Hz-10 MHz <0.03% ). Also, the wavelength could extend to be 1020-1120 nm for Ytterbium-doped fiber amplifier and 1530-1596 nm for Er-doped fiber amplifier. With stable single pass frequency doubling module, the low noise fiber laser wavelength could extend to be 510-556 nm and 765-798 nm . In the process of frequency doubling, the linewidth of the laser is doubled, and the intensity noise (RIN) is only increased by 6 dB, thus inheriting the low noise characteristics of the fundamental frequency light.

Fig. 2, Linewidth broadening test and result

PreciLasers offers a high-power (up to 130 W), low intensity noise, narrow linewidth highly-reliable 1064 nm fiber laser solution for the optical lattice application.

Typical relative intensity noise power density spectrum (RIN) * of 90 W FL-SF-1064

1: Wavelength could be selected from 1020-1112nm

Key Features:

• Low Intensity Noise (-140 dBc/Hz @100 kHz)
• Narrow Linewidth(<10 kHz)
• Good Beam quality (M² <1.2)
• High Output Power (up to 100 W)
• Operation in harsh conditions
• Full Protection System

Applications:

• Optica Lattice
• Optical Tweezers
• Optical Traps
• Pump laser for OPO

With single pass and resonant cavity SHG module, low noise 532 nm laser could be generated with output power up to 30 W, which has been applied in optical lattice application.

Typical 10 W 532 nm laser RIN spectrum

1 Central Wavelength could be selected from 510-540 nm  

Key Features:

• Narrow Linewidth<20 kHz
• Low Intensity Noise (-130 dBc/Hz @ 100 kHz)
• High Power (up to 30W @ LN-YFA-SHG)
• Good Beam Quality (M² <1.2)
• Linearly Polarize
• Active Power Stability

759/813nm Ultra-Noise Single Frequency Laser

FL-SF-759-XX-CW FL-SF-813-XX-CW

PreciLasers offers a high-power, low intensity noise, narrow linewidth highly reliable 759/813nm fiber laser solution (FL-SF-759-2-CW, FL-SF-813-4-CW) for the magic-wavelength optical for Yb/Sr atomic clock.

• Narrow Linewidth<20 kHz
• Low intensity Noise (RIN -140 dBc/Hz @ 100 kHz)
• High output power (2W@759nm 10W@ 813nm）
• Excellent beam quality (M² <1.1)
• Wavelength Tunable and high feedback bandwidth

1:Wavelength could be selected from 614-1000nm

PreciLasers offers a high-power (up to 15 W), low intensity noise, narrow linewidth highly-reliable 1550 nm fiber laser solution for the coherent detecting, precision measurement physics application.

1: Central Wavelength could be selected from1530-1580 nm

Key Features:

• Low Intensity Noise (-140 dBc/Hz @100 kHz)
• Narrow Linewidth(<2 kHz)
• Good Beam quality (M² <1.1)
• High Power (up to 15 W)
• Operation in harsh conditions
• Full Protection System

Applications:

• Precision Measurement
• Coherent Detecting
• Fundamental Light for Atom Cooling

In order to satisfy the Rb atomic interferometer and other applications, PreciLasers have developed 780 nm laser with the maximum power of 10 W by utilizing the frequency doubling technology for Rb atom cooling / detection, magic wavelength optical lattice and so on. Due to its excellent environmental adaptability such as portability, low drift and anti-vibration, FL-SF-780 nm has been used in the field experiment of Rb atomic interferometer and has completed the several months’ operation for the frequency stabilization of saturated absorption spectrum.

1: Central Wavelength could be selected from 765-795 nm

Key Features:

• Narrow Linewidth <200 Hz
• Low RIN (RIN <-130 dBc/Hz @ 100 kHz)
• High Output Power (10 W)
• Good Beam Quality (M²  <1.1)
• Tunable Wavelength
• Active Power Stability