Twice the transmission capacity of conventional LN modulators
while maintaining a compact size
The higher performance of the isolated sigma-delta modulator
enables the use of a smaller shunt resistor, which reduces thermal loss across the shunt while retaining measurement accuracy.
Moreover, to safeguard operation even if there are slight differences in the wavelengths of the light source and optical modulator
, the optical modulator
is structured with an alignment of multiple ring resonators, increasing the operating wavelength range.
One of the more significant characteristics of the modulators
is a low output noise floor, particularly for RFID applications.
According to Ford, "The modulator
has demonstrated 100 KHz operation, with a contrast ratio up to 8.
The TFPS modulators
have passed the specific testing requirements as outline in the Telcordia GR-468 standard including:
features excellent IQ accuracy with a wide bandwidth and good linearity, thus providing, along with the RF output system, an RF output that has low adjacent channel power (ACP) for testing high performance amplifiers for linearity and receivers for selectivity.
The Company offers a broad portfolio of high speed electronic devices including polymer electro-optic modulators
drivers, laser drivers and receiver amplifiers for telecom, datacom, Infiniband and consumer optical systems, covering serial and parallel communication technologies from 1G to 100G.
Figure 6 shows the simulated and measured frequency performance of the balanced biphase amplitude modulator
at 30 GHz.
The HTOL test assesses the reliability of a modulator
by stressing it at high temperature for 2000 hours while it is modulating a 1550nm laser and being driven by a high speed electrical RF signal.
The vector modulator
assembly consists of three dynamic, continuously variable vector modulators
, one static modulator
, four directional couplers, a four-channel BF summing network and a single-pole, three-throw absorptive switch multiplexer.
Responding to several large original equipment manufacturers' requests to provide a low cost, highly repeatable I/Q modulator
with sideband carrier suppression unavailable previously in a small surface-mount component, the design goals of 10 dB (max) conversion loss, carrier rejection greater than 25 dB, sideband suppression greater than 30 dB and third-harmonic suppression better than 40 dB were attained easily using the in-house design techniques for thick-film, multilayer, planar technology.