Keysight Technologies 81960A, Руководство по началу работы

Страница: 15 / 18

Keysight 81960A Compact TLS Module Getting Started Guide 15
Getting Started 1
Typical Use Models
The Keysight 81960A Tunable Laser Source Family provides high output
power up to +14 dBm.
This module covers a total wavelength range of 125 nm in the C- and
L-band.
This laser has been designed for making spectral measurements of passive
fiber optic components, where results with high wavelength accuracy and
dynamic range are needed. The laser is especially well supported by the
swept-wavelength measurement engines in the N7700A software suite
and can be programmed directly.
The key application for this laser is high repetition-rate scanning for real
time updates, benefiting from the higher sweep speeds and acceleration,
bidirectional sweeping and improved uploading of the logged wavelength
monitor data. These features are best harnessed with the N7700A-102 fast
spectral loss engine, which synchronizes the laser with the N7744A or
N7745A power meters to produce power and loss spectra in a convenient
GUI display. The wavelength resolution and 50-60 dB dynamic range
achieved surpass comparable measurements with an OSA, with repetition
rates better than 2 Hz for add-drop filter adjustment and calibration.
The high performance in continuous sweeps also matches this laser well to
the single-sweep PDL and IL N7700A measurement engine. The dynamic
wavelength accuracy will satisfy the test needs for many DWDM
components at an optimized performance/price balance. The source to
spontaneous noise ratio, SSE, while not as high as the 81600B series, is
also sufficient to qualify the isolation of many filter devices. The higher
sweep speeds save time measuring broadband devices not needing such
high wavelength resolution.
These same advantages apply to use with the N7788B component
analyzer for measuring PMD and DGD in addition to PDL and IL. The
relative wavelength accuracy during the sweeps is especially important for
accurate DGD measurements using the JME method, since the result
depends on the derivatives with respect to wavelength. The high speed is
great for measuring isolators, PMF and other broadband components.
The powerful lambdascan functions of the 816x Plug&Play driver for
customized programs, and the N7700A IL engine which provides a GUI
interface to these functions also support power and IL measurements
together with any of the Keysight power meters. And the performance of
swept-wavelength measurements in the N4150A PFL, including fast
repetitive sweeps, are also supported with this newest member of the
Keysight swept tunable lasers.