Frequency quadrupled Fiber Ultraviolet Laser

Precilasers offers high power, single-frequency tunable UV lasers from 250 to 400 nm, for applications in quantum sciences such as cold atoms, ultra-cold molecules, single-photon excitation of Rydberg atom and frequency standard. UV laser is obtained by combining an all-fiber amplifier seeded with an ultra-narrow linewidth laser, a single-pass frequency-doubling unit with PPLN crystal and a cascaded enhancement resonant cavity. These lasers has the characteristics of narrow linewidth, linear polarization and tunable. After active power control, the output power RMS of the laser is less than 1.0% within 3 hours.  

    Main Specification

    Typical Applications

    FL-SSHG
    Be+
    Hg
    He
    OPO
    K
    Rb
    Be+
    Sr
    Lithography
    Ga
    laser cooling of ytterbium atoms
    Wavelength (nm)
    235
    253
    260
    266
    286
    297
    313
    319
    390
    397
    399
    Power (mW)
    0.1-1
    50
    50
    50
    300
    300
    500
    500
    3000
    1000
    1500

     The 1050nm and 1550nm lasers with narrow linewidth are used as seed sources respectively. After amplification by single frequency fiber, the two lasers generate 626 nm laser with narrow linewidth and high power utilizing the periodically polarized crystal SFG. By cascading an efficient external resonant cavity, the wavelength of the laser is converted to ultraviolet band at 313 nm. Compared with cascading two resonant cavities with diode laser and tapered amplifier, our product has more compact and stable structure, larger output power of laser.

    Model
    EFL-FHG-XX-YY-ZZ1
    Wavelength2 , nm
    253-280
    280-307
    307-325
    385-399
    399-420
    420-500
    Output Power3 , mW
    >50
    >300
    >500
    >3000
    1000-2000
    >1000
    Linewidth, kHz
    < 40
    <400
    <40
    <10
    <40
    <50
    Tuning Range , nm
    0.15
    1.5 0.15
    Mode-Hopping Free Range, GHz
    800
    80 600
    Beam Quality
    TEM00 , M2<1.3
    PER, dB
    >20
    RMS Power Stability, %
    <1.0 %@3hrs
    Power Range
    10%-100%
    Cooling
    Air Cooling/Water Cooling

     1: XX:Central Wavelength,YY: Maximum Output Power, ZZ: Operation Mode
    2: Center wavelength can be customized
    3: Power can be customized

     

    Applications

    Key Features:

    • Simple structure single pass frequency doubling  
    • High efficiency external cavity resonance frequency doubling  
    • High output power
    • low intensity noise 
    • narrow linewidth

     

    Applications:

    • Single photon Rydberg excitation of Rubidium atom (297 nm)  
    • Beryllium ion cooling (313 nm)  
    • Grating writing (390 nm)  
    • Calcium ion optical clock (397 nm)  
    • Ytterbium atom cooling (399 nm)  

    Size

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