Evoa Application in The C or L Band

• Type: Fiber Optic Attenuator
• Wiring Devices: DDF
• Certification: ISO, RoHS
• Condition: New
• Customization: Customized Logo
• Quality Control: 100% Testing Before Shipping
• Model NO.: EVOA
• Transport Package: Box
• Specification: Small
• Trademark: ZG
• Origin: Mianyang, China

Product Description

1  DESCRIPTION
1.1 Product Function
Zg introduces a new miniature variable attenuator for application in either the C or L band. The attenuator offers excellent wavelength dependence and ripple, low polarization dependent loss (PDL), and improved thermal stability. The attenuator
provides an economical solution to managing optical power. Reflective optics permit same-side jumper exit and enable easy panel mounting. The attenuator uses an advanced graded neutral density filter as its attenuating element. Adjustment is through a stepper motor with feedback control terminal. The driver for the stepper motor moves the motor up or down in uniform step sizes, offering fine resolution. Latching operation is a standard feature; upon removal of
the drive voltage, the most recent attenuation setting is retained. An optional resistance readout for filter location purposes is available. The schematic figure of the attenuator is shown in figure 1.


Figure 1 Functional Scheme

1.2 Product Application
<Structural/application scheme, chart or description>
1.3 Related Product List

2  OPTIC AND/OR ELECTRIC SPECIFICATION
2.1 Optical Specifications

NO.	PARAMETER	SPECIFICATION			UNITS	NOTE
		MIN.	TYP.	MAX.
2.1.1	Wavelength range	800-1100			nm
2.1.2	Attenuation range	30			dB
2.1.3	Respo nse speed @3dB Adjus t Attenuation resolution			100	ms	Driven in voltage mode
2.1.4	Attenuation resolution			0.2	dB	Full Step
2.1.5	Latching stability			0.3	dB	Based on motor power ON to OFF
2.1.6	Insertion loss			1.0	dB	With connector, over wavelength rang.
2.1·.7	Attenuation line linearity			5	%	30db@±0.5db
2.1.7	Repeatability			0.1	dB	Difference in attenuation on return to a particular attenuation from a random location approaching from the same direction. Note: Attenuation value at a specific voltage/step may vary with age and will vary from unit to unit
2.1.8	Backlash			0.2	dB	Difference in attenuation on return to a particular position from a random location. Note: Attenuation value at a specific voltage/step may vary with age and will vary among units
2.1.9	Return loss @Input/output	-25			dB	With connector
2.1.10	PDL @In/Out			0.5	dB	Measured from IN to OUT ports over wavelength range @ whole adjust attenuation range
2.1.11	TDL @In/Out			0.5	dB	Measured from IN to OUT ports @ whole adjust attenuation range
2.1.12	PMD@In/Out			0.15	ps
2.1.13	Power Handling			300	mW	CW

2.2 Test method


2.3 Electrical Specifications of Step Motor

NO.	PARAMETER	SPECIFICATION			UNITS	NOTE
		MIN.	TYP.	MAX.
2.2.1	Motor Type	Step Motor,2 Phase
2.2.2	Motor Current		150	200	mA	2 phase on
2.2.3	Recommended DC Control Voltage	3.0	3.3	3.6	V	Full stepping and both coils are energized
2.2.4	Pulse width per step	1.25	2.0		ms
2.2.5	Motor Resistance		20
2.2.6	Motor Power Dissipation			2	W	Over -5~70ºC temperature range

3
ABSOLUTE MAXIMUM RATINGS

NO	PARAMETER	SPECIFICATION	UNITS
3.1	Operation Temperature	-5 ~ +70	°C
3.2	Operation Humidity	5 ~ 95	%RH
3.3	Storage Temperature	-40 ~ 85	°C
3.4	Reliability	Accord with the Telcordia GR-910,GR-1209 and GR-1221 requirement.		1

Note1:
1. Shall pass MIL-STD883(500V) ESD test.
2. Shall pass Fiber Side Pull and Fiber & Cable retention test according to GR-1209-Core.
4 ELECTRIC PORTS DEFINITION

NO	PIN	DEFINITION	DESCRIPTION	NOTE
5.1	1	Motor Coil A-
5.2	2	Motor Coil B
5.3	3	Motor Coil B-
5.4	4	Motor Coil A
5.5	5	Monitor Signal	POT WIPER, Moveable POT contact: voltage pick-off.
5.6	6	Monitor Supply+	POT+, Connect to stabilized (reference) positive supply
5.7	7	Monitor Supply -	POT-, Connect to ground
5.8	8	Case ground
5.9	9	NA
5.10	10	NA
5.11	11	NA
5.12	12	NA

NOTE: Not
5 SOFTWARE COMMAND SET
Not Applicable
6 MECHANICAL DRAWINGS
6.1 Mechanical Structure

6.2 Assembling Scheme
Not Applicable.
7 PIGTAIL AND CONNECT

NO	PARAMETER	SPECIFICATION	UNIT	NOTE
8.1	Pigtail Type(All ports)	62.5/125um or50/125um Multimode fiber		As customer's requires
8.2	Pigtail Length(All ports)	L+/- 0.1	m	L refers to the fiber length requirement in PN
8.3	Connector Type(All ports)	As customer's requires