Fiber Optic Attenuator Manufacturer

Attenuator Families: Specs, MOQ and Lead Time

Every attenuator family this fiber optic attenuator manufacturer builds is listed below with MOQ and lead time. Lead time runs from deposit and includes dB verification testing on calibrated power meters.

Family	Options	MOQ	Lead time
SC fixed plug-in	UPC / APC, 1-30 dB standard steps, SM	500 pcs	5-8 days
LC fixed plug-in	UPC / APC, 1-30 dB, SM	500 pcs	5-8 days
FC / ST fixed	Metal body, UPC, SM	500 pcs	6-9 days
Multimode fixed	50/125 and 62.5/125, 850 nm, 1-30 dB	500 pcs	5-8 days
Variable VOA	SC, LC, FC - 0-30 dB or 0-60 dB adjustment	200 pcs	7-10 days
In-line attenuators	0.9-3.0 mm cable, any connector pair	500 pcs	6-9 days

MOQ and lead-time figures are standard production windows; Chinese New Year peaks can add 5-7 days. Fixed delivery dates are confirmed in writing on the proforma invoice.

What buyers order most from this shelf

• SC/APC fixed 5 dB and 10 dB: the FTTH and CATV level-trimming staples.
• LC/UPC fixed 3 dB and 7 dB: short-reach 10G links where the transceiver overdrives the receiver.
• SC/UPC variable VOA 0-30 dB: lab benches and DWDM channel balancing.
• Multimode ST fixed: legacy campus links and instrument pads.
• FC/APC adjustable: test benches that move between power budgets.

These five cover most purchase orders. Every dB value in the standard ladder builds to your connector type and polish - the full shelf sits in the product grid above.

Why Links Need Attenuation: Four Real Situations

An attenuator solves a problem most buyers meet within the first year of operating a network - and choosing the right fiber optic attenuator manufacturer decides whether the dB value on the label is real:

• Receiver saturation on short runs: a 100 m link leaves the transmitter nearly full-power at the receiver. Error rates climb - the signal is too strong. A 5-10 dB plug-in trims the level into the receiver window.
• CATV optical levels: analog video quality degrades when the optical level drifts above plan. Fixed attenuators set each node to the design value.
• DWDM channel balancing: channels exit an amplifier unevenly. Per-channel attenuation evens the spectrum before the receivers.
• Test benches: a lab needs repeatable power levels at a port. A calibrated 3 dB or 10 dB pad makes every test run identical.

The common thread: attenuation is applied on purpose, by a measured amount from a fiber optic attenuator manufacturer that verifies every batch. That is why a fiber optic attenuator manufacturer sells numbers, not just hardware - the value printed on the body is the product.

Fixed vs Variable: Choosing by Application

Both families sit on this shelf - the core range of a fiber optic attenuator manufacturer, and the choice follows the stability of your power budget - the guidance a fiber optic attenuator manufacturer gives on every quote:

	Fixed plug-in	Variable VOA
Value	One dB value, set at the factory	Adjustable 0-30 or 0-60 dB
Accuracy	+/-0.5 dB (draft)	0.2 dB graduation on the dial
Repeatable	Yes - passive, no moving parts	Repeatability depends on the dial
Best for	Permanent links, closures, panels	Labs, balancing, commissioning
Unit cost	Lower	Higher

Practical rule from installers: fixed everywhere the link is designed once, variable where the power budget is still moving. Many projects buy fixed for the field and a handful of VOAs for the commissioning toolbox.

Application Notes by Network Type

Four network types order attenuators for four different reasons, and each pulls a different mix from the shelf:

• FTTH: ONT receivers saturate on short drops from a nearby splitter. 5-10 dB SC/APC plug-ins are the volume item, ordered per closure batch.
• CATV: analog levels tolerate no drift. Fixed values near the node design point, APC polish, low WDL - video quality reads the attenuator directly.
• DWDM / data center: per-channel balancing after amplifiers. LC plug-ins in fine steps, or VOAs during commissioning, then fixed pads lock the result.
• 5G fronthaul: short CPRI/eCPRI runs between radio units and baseband - 3-7 dB LC pads protect receivers on 25G optics.

Whatever the network, the workflow is identical: measure the surplus, pick the value, verify on the meter. The attenuator is the last step of a calculation, not a guess.

How Many dB Do You Need? The Power Budget Math

You can calculate the attenuation value yourself with four numbers from the link datasheet:

• Transmitter launch power - for example +3 dBm at the OLT or CATV node.
• Receiver saturation ceiling - for example -8 dBm, the maximum the receiver tolerates before errors.
• Link loss - fiber, splices and connectors between them, for example 4 dB.
• Reserve margin - aging headroom, typically 2-3 dB.

Worked example (illustrative): +3 dBm arrives at the receiver with 4 dB of link loss, so the receiver sees -1 dBm. The ceiling is -8 dBm. The link runs 7 dB hot - a 7 dB attenuator trims it to -8 dBm exactly at the ceiling, and the 2-3 dB reserve argues for the 10 dB step instead. Send us the four numbers and we state the value we would ship - in writing, before the quote.

Two habits keep the math honest: calculate at the highest-power wavelength, and re-check after amplifier upgrades. Attenuation solves saturation; it never repairs a link that is simply broken.

How Our Attenuators Are Built and Verified

Four steps take an attenuator from parts to a labeled, measured component - the verification culture that separates a fiber optic attenuator manufacturer from a parts reseller:

1. Element preparation: the ion-doped absorbing fiber segment is cut to the length that produces the target dB value at the rated wavelength.
2. Assembly: the element bonds between two ferrule interfaces in the housing - SC, LC, FC or ST - with the return-loss geometry intact.
3. Verification: batch testing on a calibrated power meter at 1310 and 1550 nm against a reference; the batch passes only inside the tolerance window.
4. Marking: the dB value prints or laser-marks on the housing, UPC blue, APC green, so installers read the value at the panel.

The same test bench discipline runs across the factory - it is the bench our patch cords and connectors pass through, calibrated to the same references.

Inside Our Variable VOA: Two Dial Styles

Variable attenuators come in two adjustment styles, and both sit on this shelf:

• Screw-adjust VOA: a hex or flat screw drives the internal gap; set once with a tool and the value holds. Best for commissioning and closed panels.
• Barrel-adjust VOA: the housing barrel rotates through the range - tool-free field adjustment for balancing sweeps.

Both styles read in 0.2 dB graduations on the dial scale (draft) and hold the set value across the -40°C to +75°C operating band. The adjustment mechanism adds no moving fiber parts - the attenuating element stays fixed.

PDL and WDL: The Two Specs Serious Buyers Ask For

Insertion loss tells half the story. The other half lives in two second-order specs that separate precision attenuators from padded plastic:

• PDL - polarization dependent loss: how much the attenuation changes with light polarization. Our builds hold PDL at or under 0.1 dB (draft - per-type datasheet states the window), which matters on links carrying coherent or polarization-multiplexed signals.
• WDL - wavelength dependent loss: how much the value drifts between 1310 and 1550 nm. Doped-fiber elements run flat across the window; air-gap designs drift more. Flat WDL means one attenuator behaves the same on every channel.
• Temperature stability: the value holds across -40°C to +75°C without re-trimming - the spec that decides whether a closure attenuator survives its first summer.

Ask any supplier for PDL and WDL numbers in writing. A fiber optic attenuator manufacturer with its own bench answers in the quote; a reseller asks someone else next week.

OEM, ODM and Private-Label Capability

As an OEM fiber optic attenuator manufacturer, we build to your dB ladder, marking and packaging spec:

• OEM: laser-marked dB values and your logo on housings, private-label polybags and kit boxes - free artwork proofing above 2,000 pieces.
• ODM: custom dB ladders, special wavelength builds and VOA dial ranges - samples in 10-15 days after drawing approval (draft).
• OBM / JDM: exclusive part codes and stocking terms for distributors under NDA.

OEM projects we shipped (draft references - replace with your approved cases)

• European CATV operator program, 2024: 40,000 SC/APC fixed attenuators across 3/5/7/10 dB values, delivered against node-upgrade phases.
• US test equipment maker, 2023: private-label VOA units with custom dial ranges for a bench instrument line.
• Middle East DWDM project, 2025: per-channel LC attenuator sets matched to an amplifier survey, packed channel by channel.

Attenuators usually ship together with the connectors they mate to and the adapters they seat in - one container covers the whole level-trimming job.

Certifications and Compliance

The factory runs under ISO 9001:2015, with CE reports covering passive families sold into the EU, and the company holds a utility patent on a fiber optic quick connector - evidence of the in-house R&D that also designs attenuator builds. Documents are public on the certificate page.

Certificate	Relevance to attenuators
ISO 9001:2015	Quality management for assembly and dB verification
OHSAS 18001:2007	Occupational health and safety management
CE reports	Passive families shipped into the EU
Utility model patent	Quick connector design - the factory's R&D depth

RoHS-compliant materials on request; batch test data joins every shipment.

Factory Strength: Measured Values Need a Real Bench

A dB value means nothing without the meter behind it. Our attenuator bench sits inside the Yiwu compound that produces cable, connectors and cords - 25 years under founder LING LI, since December 2000:

• Calibrated reference: power meters calibrated against reference standards; the dB value on the housing traces to that calibration.
• Batch verification: every batch reads against the reference at 1310 and 1550 nm; Grace Xu, Quality Director, signs the release.
• R&D: Zhou Liubo, Director of R&D and patent holder, owns custom dB ladders and wavelength builds.
• Export: Peter Lin, Head of Export Sales - one contact from RFQ to B/L. Video audits run any business day - see the factory gallery.

Company quick facts
Founded	December 2000, Yiwu City, Zhejiang, China
Founder	LING LI, Founder & General Manager
Focus	Attenuators, connectors, adapters, patch cords, pigtails, cable, splitters, ODFs
Export markets	40+ countries across Asia, the Middle East, Africa, Europe and the Americas
Response time	Quotes within 24 hours on business days

Test Labs and Production Lines: Where Values Get Audited

Attenuator buyers include labs whose whole business is measurement. Our lab program answers the questions a metrology team asks:

• Calibration data per batch: the power-meter readings at 1310 and 1550 nm, traceable to our reference, in the shipment file.
• Value stability: repeatability runs within +/-0.1 dB across re-mating on zirconia-sleeve types (draft - per-type datasheet states the window).
• Custom pads: odd values - 4 dB, 6 dB, 8 dB - build to order for fixture-specific budgets.
• Label discipline: value, polarity and batch on every housing, readable without a datasheet.

Labs reorder because the values repeat. That sentence is the whole pitch - and it is why this fiber optic attenuator manufacturer treats the power meter as the real production line.

Why Buyers Pick HENGXANG Over Other Suppliers

Attenuators are small parts with large consequences. Compare on the points that decide whether the dB value is real:

Factor	HENGXANG	Typical trading company
Verification	Batch power-meter test against calibration references	Supplier's word
Value ladder	Standard 1-30 dB plus custom values to order	Common values only
Sleeve and polish	Zirconia sleeves, UPC and APC, stated per line	Unstated
MOQ	200-500 pcs; mixed dB values share the run	Large single-value minimums
Quote speed	Within 24 hours on business days	Days
Range	Attenuators + connectors + adapters + panels, one order	Single category

And one habit worth naming: if your power survey says the link does not need attenuation, we say so - selling a 10 dB pad into a link that needs none loses us nothing today and costs us the re-order.

How We Work With You: From dB List to Delivered Boxes

Six steps, all written down:

• Step 1 - RFQ: send the dB values, connector types and quantities. WhatsApp +86 134 3434 9304 or the contact form.
• Step 2 - Quote: prices, MOQ, lead time and packing plan within 24 hours on business days.
• Step 3 - Samples: sample attenuators ship in 3-5 days for your power meter.
• Step 4 - Production: photos at assembly and test stages while your order runs.
• Step 5 - Inspection: batch verification plus third-party inspection on request.
• Step 6 - Shipment: EXW, FOB Ningbo/Shanghai or CIF; documents within 3 working days of sailing.

How We Verify: The Bench Procedure, Line by Line

Verification is the product, so here is the exact batch procedure:

1. Warm and reference: the power meter warms up and zeroes against the reference launch - never measured cold.
2. Baseline: a master connector pair reads the bench baseline without the attenuator.
3. Batch read: sample adapters from the batch insert into the reference chain; the meter reads the added loss at 1310 and 1550 nm.
4. Window check: the reading must sit inside the datasheet tolerance - inside, release; outside, the batch stops and engineering opens the elements.
5. File: the readings join the batch file, and the file ships with the goods.

The same five lines run for fixed and variable types - variable units read at three dial positions. This procedure is why our dB labels survive an audit.

Worked Example: A Level-Trimming Kit for a CATV Node Upgrade

Illustrative figures - your quote states yours. An operator upgrades 200 nodes and needs a trimming kit per node: 4,000 attenuators across four values:

Step	Detail
Day 0	dB list received: 1,000 pcs each of SC/APC 3, 5, 7 and 10 dB
Day 1-2	Samples of all four values airfreighted for bench verification
Day 3-8	Production: element prep, assembly and housing per value; batches kept separate
Day 8-9	Verification run; each value's readings filed against the reference meter
Day 10	Pack: four value-labeled cartons, one container slot
Day 11	Trucked to Ningbo, FOB; test files and documents within 2 days of sailing

Eleven days from dB list to labeled cartons - the pace a fiber optic attenuator manufacturer with its own bench can promise in writing.

The same flow covers mixed-value kits, custom dB ladders and VOA programs - the only variable is the production calendar slot. Buyers who send the dB list today typically hold labeled cartons inside two weeks; buyers who guess at values hold an argument. Choose the first.

Trim the Level, Then Run the Whole Shelf

Attenuators from this fiber optic attenuator manufacturer sit in panels next to everything else this factory builds: the connectors and adapters they mate with, the patch cords around the frame, the cable in the route, and the termination boxes and ODFs that hold the panel. Receivers still hot after the splitter? Balance the split with our PLC splitters page, and read the ODF planning guide before the rack layout locks. One purchase order, one freight plan, one warranty conversation.

Frequently Asked Questions

What Cheap Attenuators Get Wrong

Field engineers meet the same four defects on bargain attenuators, and each traces to a skipped factory step:

• The value is wrong - no power-meter verification at the factory. Ours reads every batch against a calibrated reference; the value on the housing is a test result, not a hope.
• The value drifts with wavelength - air-gap or resistor-pad designs with high WDL. Doped-fiber elements hold the value flat from 1310 to 1550 nm.
• PDL breaks the link - uncontrolled polarization response that blinks coherent links. Our builds hold PDL at or under 0.1 dB (draft window).
• The sleeve fails after a season - plastic or soft-bronze sleeves in a panel meant for zirconia. We state the sleeve on the quote so the buyer chooses the lifecycle, not the seller.

None of these defects shows in a product photo. All of them show on a power meter in the first week - which is why samples ship free and why the bench evidence belongs in the quotation.

Storage and Maintenance: Attenuators Are Set-and-Forget, With One Exception

Fixed attenuators are passive and sealed - installed correctly, they run for decades with no maintenance. Two situations bring them out of the panel:

• Link upgrades: a transmitter swap changes the power budget; the old pad value may be wrong for the new optics. Re-run the four-number math and swap values if the answer moved.
• Dirty end faces: an open attenuator port collects dust exactly like a connector port. A one-click cleaner on the ferrule ends restores the reading - the attenuator itself was never the problem.

Variable VOAs need one extra check: the dial value after any bump or panel move. A 30-second meter read confirms the setting held.

Packing and Labels

Standard packing: 100 pieces per PE bag with a type-and-value label, 10 bags per export carton, desiccant included. Custom packing - blister cards, tube packaging for in-line types, or your barcode layout - runs from 2,000 pieces. Every label states the dB value, connector type, polish and sleeve, so a warehouse sorts attenuators without opening a bag.