Original OSN8800 OBU2 TN97OBU2 TN97OBU202 Extended C-band Optical Booster Unit with Pump protection

Yantai Boxin International Trading Co., Ltd. is a professional comprehensive trading service provider for communication equipment.With warehouses established in Yantai and Hong Kong, we have built a complete and localized network for delivering communication products and services.In 2018, Yantai Boxin International Trading Co., Ltd. set up its international sales department in Yantai, China.Based in China, we operate in emerging markets across Southeast Asia, India, the Middle East, Africa, Europe, and the United States. 

Yantai Boxin International Trading Co., Ltd. supplies products to various telecom operators, meeting their needs for supplementing and expanding 2G/3G/4G/5G network stations.Our current equipment portfolio covers brands such as Nokia, Ericsson, Alcatel, Huawei, ZTE, ZTT, and FiberHome. 

We expand our international market share by offering high-quality products, excellent service, competitive pricing, and timely delivery.Feel free to contact us for more information.

Product Description

1.Product Overview

1.Basic information of the board

Attribute specification description

OptiX OSN 9800 series intelligent optical transmission platform

Board Name: Optical Amplification Unit Board (Extended C-band, High Power Rear Amplifier)

Functionally positioned as a booster amplifier (BA) for use, it enhances the total optical power after multiplexing, supports higher fiber input power requirements, and is suitable for expanding C-band DWDM systems

Board type Optical Booster Unit (OBU)

Compatible with subracks such as OSN 9800 U series/M series that support TN series cards

Front panel dimensions: height x width x depth: 264.6 mm x 25.4 mm x 220 mm

Weight 1.0 kg

Typical power consumption of 16.0 W

Maximum power consumption of 19.0 W (normal operation at maximum ambient temperature)

Working temperature -5°C to+55°C

Key features include extended C-band amplification, high output power (+24dBm), adjustable gain, low noise figure, automatic power control (APC), automatic gain control (AGC), integrated OSC processing, online monitoring interface, enhanced transient control

2.Interface specifications

Interface Identification Interface Type Quantity Function Description

IN LC/UPC 1 optical signal input port, usually connected to the output of the self multiplexer (M40)

OUT LC/UPC 1 optical signal output port, amplified signal output to fiber optic line

SYS IN LC/UPC 1 system input port (spare)

SYS OUT LC/UPC 1 system output port (spare)

OSC IN LC/UPC 1 optical monitoring channel input port, receiving OSC signals

OSC OUT LC/UPC 1 optical monitoring channel output port, sending OSC signal

MON LC/UPC 1 online monitoring port, can be connected to an external spectral analyzer or OPM unit

3.Core functional characteristics

Functional Module Technical Description System Value

Optical signal amplification serves as a post amplifier (BA) to amplify and compensate for the insertion loss of the extended C-band multiplexing signal, injecting the signal into the fiber with higher power and supporting longer spans or higher loss links

High output power with a maximum output power of+24 dBm (saturated) provides higher fiber input power than TN12OBU 1, meeting more stringent power budget requirements

Adjustable gain supports software adjustment of amplifier gain values (typical range 15-28 dB) to flexibly adapt to different output and input power requirements of the multiplexer, simplifying engineering planning

The OSC channel processing has built-in OSC multiplexing and demultiplexing function, which separates/merges the optical monitoring channel from the main optical signal to ensure independent transmission of out of band monitoring channels and achieve uninterrupted network management communication for business

Automatic power control (APC) supports constant output power mode, automatically adjusts pump power to maintain stable output power and cope with input power fluctuations, ensuring constant fiber input power and improving system robustness

Automatic Gain Control (AGC) supports constant gain mode, automatically adjusts output according to changes in input power, and flexibly adapts to different work scenarios

Low noise design optimizes the optical path design, with a noise coefficient of ≤ 4.8 dB (typical value), ensuring that the signal-to-noise ratio is not significantly degraded while amplifying the signal

Enhanced transient control with built-in high-speed response circuit provides stronger suppression ability for sudden changes in input power (such as channel up and down), ensuring stable remaining channel power and uninterrupted business operations

Online optical performance monitoring provides MON monitoring port, which can be connected to an external spectral analyzer to monitor signal spectrum, optical power, OSNR and other parameters in real time without interrupting business for optical layer performance diagnosis and optimization, improving operation and maintenance efficiency

Real time monitoring of pump laser to detect parameters such as pump drive current, back current, cooling current, pump temperature, etc.Monitoring of pump source health and warning of potential faults

4.Optical performance parameters

Table 1: Key Optical Indicators

Parameter specification remarks

Working wavelength range: 1528.8 nm -1567.6 nm Extended C-band, supporting 96 wave @ 50GHz system

Gain range of 15 dB to 28 dB software adjustable, with a step size of 0.5 dB

Maximum output power+24 dBm (saturated) can be set with software limits, typical operating point is+20/+22/+24 dBm

Noise figure ≤ 4.8 dB (typical value) @ maximum gain condition

Input power range -25 dBm to+5 dBm to ensure performance input range

Gain flatness ≤ 1.0 dB (typical value) across the entire operating wavelength range

Polarization related gain ≤ 0.3 dB is insensitive to polarization effects

Polarization related loss ≤ 0.3 dB

Return loss>45 dB Excellent return loss characteristics, reducing reflections

OSC working wavelength 1510 nm ± 10 nm (or 1625 nm ± 10 nm) standard OSC wavelength, optional

OSC insertion loss ≤ 1.5 dB OSC channel insertion loss

When the transient response time is less than 0.5 ms and the input power step is ± 6dB

Table 2: Typical performance under different output power settings

Minimum gain noise figure required for target output power and input power range

+20 dBm       -5 ~ +5 dBm 15~25 dB      ≤4.5 dB

+22 dBm       -7 ~ +3 dBm 19~29 dB      ≤4.7 dB

+24 dBm       -9 ~ +1 dBm 23~33 dB      ≤4.8 dB

5.Monitoring and management functions

Monitoring Category Monitoring Parameter Management Function

Real time monitoring of amplifier working status for total input/output power of optical power monitoring, pump laser backlight power, and setting high and low threshold alarms

Pump laser monitoring pump current, pump temperature, pump output power monitoring pump source health, warning potential faults

Temperature monitoring board internal temperature and pump laser temperature to prevent overheating and damage, ensuring long-term stability

Gain/power monitoring ensures that the amplifier operates in the expected state by monitoring the actual gain value, actual output power, and locked state

Alarm management quickly locates faults such as input no light, abnormal output power, pump laser failure, and temperature exceeding, achieving preventive maintenance

6.Power consumption and environment

Parameter specifications

Typical power consumption of 16.0 W

Maximum power consumption of 19.0 W (normal operation at maximum ambient temperature)

Working temperature -5°C to+55°C

Storage temperature -40°C to+70°C

Relative humidity 5% to 95% RH, no condensation

Air pressure requirement: 70 kPa to 106 kPa

7.Comparison with TN12OBU 1

Characteristics TN12OBU 1 TN12OBU 2

Maximum output power+23 dBm+24 dBm

Noise coefficient ≤ 5.0 dB ≤ 4.8 dB

Transient response time<1 ms<0.5 ms

Typical power consumption 14 W 16 W

Gain range 15-28 dB 15-28 dB

Application positioning: General BA, high-power, high-performance BA

8.Application scenarios

Core Value of Application Scenario Deployment Method

The ultra long distance mainline transmitter is deployed after the long span mainline OTM station combiner, as a post amplifier with higher output power to support further relay free transmission and reduce the number of relay stations

The high loss link transmitter deploys a+24dBm output to compensate for additional losses on links with extremely high insertion losses (such as ultra long spans and multiple connectors), ensuring system performance margin

The output amplifier of the high-capacity ROADM node is located inside the ROADM node to increase the power of the multiplexed signal and compensate for the high insertion loss of the ROADM module, ensuring that the output power meets the requirements of the line

Data Center Interconnection (DCI) uses high output power as a BA at the DCI transmitter to support longer relay free DCI transmission, reducing construction and operation costs

The sending end of the submarine cable system serves as the sending end BA at the submarine cable landing station to meet the strict requirements of the submarine cable system for high fiber input power

9.Maintenance and ordering information

Project Information

Component code TN12OBU 2 (specific version such as TN12OBU 201, etc.)

Ordering instructions: When placing an order, it is necessary to confirm the working band (extended C-band), target output power level, and OSC wavelength

On site operation supports hot plugging, and anti-static wrist straps should be worn during operation.Pay attention to cleaning the fiber optic connectors

After testing and verifying installation, output power calibration, gain testing, and OSC channel connectivity testing are required

As a core board for high-power transmission, spare parts management is recommended to be configured at critical nodes in the network

Core Summary:

TN12OBU 2 is a high-power rear mounted optical amplifier board designed specifically for extending the C-band transmitter on the OSN 9800 platform.Based on TN12OBU 1, the maximum output power is increased to+24dBm, the noise figure is optimized to ≤ 4.8dB, and the transient response is faster.It is an ideal choice to meet higher power budgets and more stringent link requirements.

Core values and positioning:

Higher output power:+24dBm maximum output, 1dB higher than OBU 1, providing more sufficient fiber input power.

Lower noise: ≤4.8dB noise figure, ensuring signal quality.

Faster transient control: response time<0.5ms, ensuring business stability.

Flexible adaptation: APC/AGC dual-mode, adjustable gain, suitable for different needs.

Integrating OSC and monitoring: simplifying design and improving maintainability.

Application suggestion:

This board is the preferred BA for extended C-band high-power transmission in OSN 9800 wavelength division system, especially suitable for scenarios that require higher fiber input power and better noise performance, such as ultra long span trunk lines, high loss links, submarine cable systems, etc. During deployment, it is necessary to set the output power reasonably according to the link budget and combine it with iMaster NCE to achieve automated operation and maintenance of the optical layer. For conventional power requirements, TN12OBU 1 is a more cost-effective choice.