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高功率激光器 High Power 1550nm ITU CW DFB Laser JDSU CQF938/500
發(fā)布時(shí)間: 2018-05-21 16:02
In modern hybrid fiber coax (HFC) and cable television (CATV) systems, 1550nm externally modulated laser sources are used for super trunking and distribution.Due to the availability of the erbium-doped fiber amplifier (EDFA), which allows re-amplification of the optical signal without conversion into radio frequency (RF), such systems are very flexible in providing custom-made solutions with good carrier-to-noise ratios (CNR). In short haul metro links, the high power of the JDSU CQF938 eliminates the need for additional amplifiers.
Description
In modern hybrid fiber coax (HFC) and cable television (CATV) systems, 1550nm externally modulated laser sources are used for super trunking and distribution.Due to the availability of the erbium-doped fiber amplifier (EDFA), which allows re-amplification of the optical signal without conversion into radio frequency (RF), such systems are very flexible in providing custom-made solutions with good carrier-to-noise ratios (CNR). In short haul metro links, the high power of the JDSU CQF938 eliminates the need for additional amplifiers.
The CQF938 high power 1550 nm continuous wave (CW) distributed feedback (DFB) laser is available in a standard 14-pin butterfly package equipped with a polarization maintaining fiber (PMF) to facilitate coupling to a modulator. It shows superb thermal stability, high side-mode suppression ratios (SMSR), very low relative intensity noise (RIN), and small linewidths.
The modulation bandwidth is in excess of 1 GHz, and permits various techniques for stimulated Brillouin scattering (SBS) suppression. SBS is a detrimental effect that can occur at very high power levels into the fiber, and which leads to noise bursts.
Application
In modern hybrid fiber coax (HFC) and cable television (CATV) systems, 1550nm externally modulated laser sources are used for super trunking and distribution.Due to the availability of the erbium-doped fiber amplifier (EDFA), which allows re-amplification of the optical signal without conversion into radio frequency (RF), such systems are very flexible in providing custom-made solutions with good carrier-to-noise ratios (CNR). In short haul metro links, the high power of the JDSU CQF938 eliminates the need for additional amplifiers.
The CQF938 high power 1550 nm continuous wave (CW) distributed feedback (DFB) laser is available in a standard 14-pin butterfly package equipped with a polarization maintaining fiber (PMF) to facilitate coupling to a modulator. It shows superb thermal stability, high side-mode suppression ratios (SMSR), very low relative intensity noise (RIN), and small linewidths.
The modulation bandwidth is in excess of 1 GHz, and permits various techniques for stimulated Brillouin scattering (SBS) suppression. SBS is a detrimental effect that can occur at very high power levels into the fiber, and which leads to noise bursts.
Features
- 1550nm DFB laser diode
- Three power versions available at a minimum of 40, 50,and 63mW, respectively
- 25Ω electrical matching
- Polarization maintaining fiber
- Built-in thermoelectric cooler
- Cooled built-in optical isolator
- Excellent relative intensity noise (-160dB/Hz maximum)
- Narrow linewidth (1MHz maximum)
- High side-mode suppression ratio (45dB typical)
Application
- HFC networks, CATV networks, and metro architectures where high power, low RIN, and narrow linewidths are required
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