Introduction of Mini Optical Fiber Mixer

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2022-08-20

In the field of optical fiber communication, the wavelength used is in the near-infrared region, and the two commonly used communication windows are 980nm and 1550nm. If you want to use light sources in these two bands for optical information transmission at the same time, there is a product that can do it. This product is an integrated optical fiber device IWDM.

So what exactly is IWDM? What are its advantages? This is one aspect of information we need to know. In simple terms, the fiber hybrid is composed of three parts: reflective end, isolation core and collimator. The appearance structure of the product is a 1*2 structure, and the specific structure diagram is as follows:

IWDM can be divided into forward and backward, as shown in the optical path diagram below, and can be manufactured according to specific needs.

In actual use, the light source at the signal end comes in from the common end, and two different wavelength bands of light will be separated from the pumping section and the transmission end, respectively 980nm and 1550nm for optical communication. If used in the manufacture of EDFA, this device plays the role of wavelength division multiplexing and optical isolation, and the pump light can be incident on the erbium-doped fiber to play the role of optical amplification. Because there is an isolation core inside the device of the product, it can reduce the interference of reflected light on the optical signal at the light source end, and the product has the advantage of high isolation.

At present, the products produced by our company can have a minimum product size of 2.2*25mm, which can reduce the size of the entire EDFA module. The product has the characteristics of low loss, low polarization, high isolation, and small size. The relevant performance parameters can meet the following requirements:

Parameter			unit	Spec
Center Wavelength			nm	980/1550
Single/Dual Stage				Dual Stage
Pass Port	Wavelength Range λs		nm	1525~1570
	Insertion Loss @23℃λs	Max	dB	0.7
	Isolation@23℃λp	Min	dB	40
	PDL	Max	dB	0.15
	PMDs	Max	P.S.	0.05
Pump Port	Wavelength Range λp		nm	970~990
	Insertion Loss@23℃ λp	Max	dB	0.50
	Isolation@23℃λs	Min	dB	25
	PDL	Max	dB	0.10
Return Loss		Min	dB	55
Fiber Type		Min	m	Depend on customer
Power Handling		Max	mw	500
Operating Temperature			℃	-40~75
Storage Temperature			℃	-40~85
Package Size			mm	2.2*25

Our products meet the reliability requirements of international standards GR-1221-CORE and GR-1209-CORE. If you are interested in or need this product, please feel free to contact us.

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The company held the 2022 annual skill competition, the awarding of enterprise craftsmen and the of advanced figures

2021/09/15