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DFB Laser Modules

  Integrated current source

  Integrated temperature controller

  High optical output power

  ITU Wavelengths – Full C band coverage

  Attach #1 : Datasheet  

 

 

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DFB Laser Modules
 
Gooch & Housego offers electronics to achieve ultra low noise, high stability, and precision frequency tuning.  Click the links in the table below for information on each product. Our high stability laser modules offer linewidth and packaging variations  whilst the EM655 offers an RF transmitter for high bandwidth applications.
 
High Power DFB Laser Modules
 
EM650 represents a precision OEM control solution for Gooch & Housego's high power DFB fiber-coupled lasers operating with excellent frequency stability, narrow linewidth, low noise, and stable polarization. Each module contains a high-power DFB laser, optical isolator, single-mode fiber pigtail, thermo-electric cooler, thermistor, temperature controller, and monitor monitor photo-diode. The entire module operates from a single +5 V supply. The unit provides a bi-directional power adjust input that may be used for SBS prevention, for constant power operation in conjunction with the monitor detector readout signal and an external control loop, or for finely adjusting the laser oscillation frequency via chirp. The product uses use G&H's high-reliability platform for defense components and incorporates an advanced ultra-low noise laser current source. The EM650 drives the internal TEC with an audio quality class AB linear H-bridge and incorporates multiple layers of EMI protection. It offers performance comparable to laboratory equipment in a much smaller package. Product features

  • Integrated current controller
  • Temperature tuning of frequency
  • Drive current tuning of power and frequency
  • Low relative intensity noise (RIN)
  • Low linewidth
  • Operates from single +5 voltage supply
  • Small 2.5"x2.5" package (65x65mm²)
 
High Bandwidth DFB Laser Modules / RF Transmitters
 
The EM655 RF Transmitter integrates a high bandwidth fiber-coupled DFB laser with both an ultra-low noise laser current source and temperature controller.  The module also contains an optical isolator and back facet monitor detector readout amplifier.  The entire module operates from a single +5V supply and offers a bi-directional bias adjust input that may be used to control the laser output power or finely adjust the laser oscillation frequency via chirp.  The unit also incorporates bi-directional temperature adjust input for coarse tuning of the laser oscillation frequency. The module is designed and built using Gooch & Housego's high reliability platform for defense components and incorporates an advanced ultra-low noise laser current source. Product features
  • Integrated current source
  • Integrated temperature controller
  • Operates from single +5V supply
  • Simple RF K-connector interface
  • Small package: 2.5"x2.5" (66x66mm²)
 
Narrow Linewidth DFB Laser Modules
 
The Gooch & Housego EM750 represents a new generation of OEM narrow-linewidth lasers. It is based on their family of integrated DFB lasers known for ultra-low noise, stability, and tunability. The new EM750 combines these traits with a mechanism that retains all the advantages of the EM650, but reduces the linewidth to a typical value of <10 kHz. The new EM750, based on our EM650 DFB laser, is a significant simplification in the design of a kHz laser.  DFB Lasers use a diffraction grating in the active region of the semiconductor device and our EM650 DFB laser achieves 300 kHz linewidths.  The EM750 stabilizes the phase noise of the EM650 with proprietary passive G&H fiber optics. The laser phase noise is significantly reduced for frequencies below ~15 MHz.  Linewidths of <10 kHz are achievable sacrificing very little of the EM650 power. The first versions released are rated at 35 mW across the 1.55 micron wavelength C-Band. The phase noise reduction is not wavelength sensitive and so the EM750 can operate over the full tuning range of the DFB (~±75GHz) without compromising the linewidth, making it well suited for high-resolution laser spectroscopy. Since the EM750 does not rely on active feedback, sensitive external cavities, or other complex opto-mechanical arrangements the design is inherently stable and highly scalable. The module is compact at 124 x 78 x 10 mm and consumes no more power than an unstabilized DFB module. 
 

 

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