Digital 2.5G DFB-LD Laser

 

 

Model Number	BLLD-235-SA4A(G)
Brand Name	Belycomm
Mounting Type	universal type
Description	DFB LASER Digital chip Coaxial Laser Module
Type	Laser Diode
Place of Origin	Fujian, China
Package Type	Through Hole
Package / Case	Coaxial
Operating Temperature	-20~+70℃
Application	Optical Bidi Module and Optical transceivers
Supplier Type	original manufacturer, ODM, agency, retailer
Media Available	datasheet, Photo

 

 

Selling Units	Single item
Single package size	20.00*14.00*5.00 cm
Single gross weight	0.500 KG

 

 

Quantity (pieces)	1 - 100	101 - 1000	1001 - 10000	> 10000
Lead time (days)	16	25	31	To be negotiated

 

• 1550nm Direct Modulation: Utilizes DFB-LD as a transmitter, ensuring stable wavelength performance for optical transceiver and bidi module integration.

• Low Noise & Distortion: Critical for high-speed data transmission in large-scale telecom networks, reducing signal interference in bulk installations.

• Built-in InGaAs/PIN Monitor: Enables real-time performance tracking, minimizing maintenance costs for wholesale 2.5G DFB-LD deployments.

• High Reliability: 100,000+ hour lifespan and -20~+70℃ operating temperature range, suitable for industrial environments and mass deployment.

• Compact Coaxial Design: Universal mounting type simplifies integration into diverse optical modules, ideal for ODM customization.

 

The BLLD-235-SA4A(G) 2.5G DFB-LD laser diode is trusted by leading brands:

 

• Optical Transceivers: Deployed in 10G/25G telecom transceivers for 5G base stations.

• Optical Bidi Modules: Used in fiber-to-the-home (FTTH) networks for bidirectional data transmission.

• Test Equipment: Integrated into optical signal analyzers for lab and field testing.

 

This 2.5G DFB-LD laser is engineered to withstand harsh industrial environments, with strict adherence to operational limits for bulk reliability:

 

Parameter	Symbol	Min	Type	Max	Unit	Test Condition
Reverse Voltage(LD)	Vr(LD)	-	-	2	V	CW
Forward Current(LD)	If(LD)	-	-	100	mA	CW, 25℃
Reverse Voltage(MPD)	Vr(PD)	-	-	15	V	CW, 85℃
Forward Current(MPD)	If(PD)	-	-	2	mA	CW, Iop=Ith+20mA
Storage Temperature	Tstg	-40	-	+85	℃	CW, Iop=50mA
Operating Temperature	Topr	-20	-	70	℃	CW, Iop=Ith+20mA
Lead Soldering Temperature/Time	Ts	-	260/10 or 360/5	-	℃/S	VRD= 10V
Fiber Bend Radius	R	30	-	-	mm

 

For optical transceiver laser module manufacturers, precise performance metrics are critical. The BLLD-235-SA4A(G) delivers consistent results in bulk applications:

 

Parameter	Symbol	Min	Type	Max	Unit	Test Condition
Threshold Current	Ith	3	-	15	mA	CW
		-	-	50	mA	CW,T=85℃
Operating Voltage	Vf	-	1.1	1.5	V
Optical Output Power	Pf	-	10	-	mW	CW, If=50~65mA
Center Wavelength	λc	1540	1550	1560	nm	CW, If=Ith+20mA
Rise/Fall Time(20-80%)	Tr/Tf	-	-	120	pS	If=Ith, Po=Pf, 50 Ohm
Monitor Current	Im	100	-	1000	uA	CW, If=Ith+20mA
Capacitance	C	-	10	15	PF	VRD=5V, f=1MHz
Dark Current	Id	-	-	100	nA	VRD=5V
Spectral Width(-20dB)	Δλ	-	-	0.3	nm	CW, If= Ith+20mA
Slope Efficiency	SE	0.19	-	-	W/A	CW, If=Ith+20mA
Tracking Error	TE	-1.5	-	1.5	dB	CW, Im=Constant & If=Ith+20mA
Bandwidth	BW	-	2.5	-	GHz
Side Mode Suppression Ratio	SMSR	30	-	-	dB	CW, If= Ith+20mA
Optical Isolation	ISO	30	-	-	dB

 

 

BLLD	-X	X	X	-X	X	X	(X)
Product Type	Speed	LD Specification Type	Wavelength	Connector	Pin	Definition	Others
LD: Pigtail TOSA	0：155M 1：1.25G 2：2.5G …… 8：8G A：10G	1：Vcsel 2：FP 3：DFB	1：850nm 2：1510nm 3：1310nm 4：1470nm 5：1550nm	SA：SC/APC FA：FC/APC S：SC/PC F：FC/PC …… N: No connector	4：4PIN 5：5PIN	A：A type B：B type C：C type …… V：V type	G: With isolation I: With wave plate R: With flex plate

 

 

 

 

 

 

 

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