Test and Measurement Tunable Laser

lasers
High-Power Discretely Tunable DFB
Laser Modules for DWDM Testing
• High optical-power option of 20 mW
• Integrated wavelength locker for 25-GHz channel spacing or higher
• Built-in Digital Signal Processor (DSP) and control electronics
This compact 10- and 20-mW transmission DFB
laser uses proprietary packaging technology to deliver
highly efficient, small form-factor modules that previously
were not possible.
Ideally suited for use in a wide variety of DWDM systems,
the TLB-3900 series lasers provide the best
combination of performance features available, offering
a unique combination of high optical powers, wide
tunability of 36 nm over the C band, and stability in
harsh environments. These modules include an integrated
wavelength locker, simple serial electrical interface,
and a uniquely stable and reliable design including a
built-in thermo-electric cooler for high stability.
High-powered performance, reliability, ease of manufacture,
and economies of scale derived from this
exclusive, proven design differentiate this product
from others in the industry.
Power 10 mW 20 mW
Power Variation
(maximum, over wavelength)
Power Variation
(maximum, over temperature)
±0.5 dB ±0.5 dB
±0.5 dB ±0.5 dB
Tuning Range (typical) 35 nm 35 nm
Channel Spacing 25 GHz (ITU grid) 25 GHz (ITU grid)
Lower Wavelength Limit 1528.77 nm 1528.77 nm
Upper Wavelength Limit 1563.05 nm 1563.05 nm
Wavelength-Switching Speed
(typical)
3 s 3 s
CAUTION: Viewing the laser output
with certain optical instruments (for
example, eye loupes, magnifiers, and
microscopes) within a distance of
100 mm may pose an eye hazard.
Linewidth (FWHM)
2 MHz typ
(10 MHz maximum)
2 MHz typ
(10 MHz maximum)
Wavelength Accuracy
(over life, steady-state)
±1.5 GHz ±1.5 GHz
Side-Mode Suppression Ratio 50 dB typ (40 dB min) 50 dB typ (40 dB min)
Min. Optical Isolation 30 dB 30 dB
RIN
(20 MHz–10 GHz)
Polarization Extinction Ratio
(E-field along slow axis)
–145 dB/Hz
(–135 dB/Hz max)
20 dB 20 dB
–145 dB/Hz
(–135 dB/Hz max)
Fiber Type Fujikura PANDA PM Fujikura PANDA PM
Fiber Connector
FC/PC-R-type
(narrow key)
FC/PC-R-type
(narrow key)
Key Alignment Slow Axis Slow Axis
Supply Voltage (relative to ground) 3.3 V 3.3 V
Peak Supply Current (while tuning) 2 Amps 2 Amps
Total Power Dissipation (typical) 2 W 2 W
Serial/RS-232 DB-9 (female RS-232) DB-9 (female RS-232)
Operating Temperature 10–40 °C 10–40 °C
Storage Temperature –40–95 °C –40–95 °C
Model # TLB-3901 TLB-3902
Price* $6,500 $7,500
Related Products: Power Meters (page 134) Photodetectors (pages 76–131)
Definitions of Characteristics (page 51)
40
*For international prices add 10%.
sales@newfocus.com fax: (408) 919–6083

10-Gbit/s 850-nm VCSEL
• 50-µm fiber connection
• Convenient and easy to use
• Ideal in fiber and breadboard systems for characterizing datacom transceivers
Designed for use in laboratory applications
or for test and measurement of 10-Gbit/s datacom
devices, the Model 1780 is an 850-nm,
10-Gbit/s, directly modulated, multimode
vertical-cavity surface-emitting laser (VCSEL).
The Model 1780 uses high-performance
microwave circuitry to ensure clean delivery
of the electrical input to the VCSEL chip,
and the VCSEL’s 50-µm output fiber enables
the use of either 50-µm or 62.5-µm fiber. The
AC-coupled input and internal bias circuitry
allows connection to any high-speed 60-Ω
SMA-compatible signal source without the need
for additional bias circuitry. A 10-position switch
allows for optimization of the VCSEL bias for
different datacom applications.
Nominal Wavelength
Bit Rate
Output Power
Small-Signal
3-dB Bandwidth
Low-Frequency
Cut-Off
Small-Signal Gain
Impulse FWHM †
RMS Noise ††
Small-Signal
Input Impedance
Electrical Input
(SMA compatible)
Optical Output
Output Fiber
Power Supply
850 nm
10 Gbit/s
800 µW (typical)
750 µW (minimum)
7.5 GHz (typical)
7.0 GHz (minimum)
10 kHz
1.4 mW/V (typical)
1.2 mW/V (minimum)
55 ps (typical)
60 ps (minimum)
2.2% (typical)
2.8% (maximum)
60 Ω
Model # 1780
Price* $5,900
Price, 3-yr Extended
Warranty †††* $995
Wiltron ® K Connector,
Male
FC/PC
50-µm Multimode
±15 V, 50 mA
(Model 0901
recommended)
Unless otherwise noted, these specifications are for a bias
setting of 6 with a photoreceiver optical return loss of 20dB.
† Input is a negative impulse with a high/low optical power
ratio of 4.8 dB and a bias setting of 9.
†† Measured as a percentage of cw output power by a
Model 1580 photoreceiver over 10 m of fiber.
††† See our terms and conditions of sale for more details.
Typical eye diagram taken using the
Model 1780 VCSEL and a Model 1580
photoreceiver (page 118) at 10 Gbit/s.
Lasers
Swept Wavelength Finely Tuned Multipurpose OEM Modules
Test & Measurement Sources Laser Products Focus
Related Products: 40-GHz Flex Cables (page 139) Power
Supplies (page 138) Photoreceivers (pages 116–125)
*For international prices add 10%.
phone: (408) 919–1500 www.newfocus.com 41